Benefit Cost analysis of growing vegetables in the backyard

People often tell me that growing vegetables costs too much, or that they are cheaper to buy from the shops, my reply to them is "you are doing it wrong".

Growing vegetables will save you money.  If you are spending more than you save you are doing something wrong.  Grow some food, it will save you money. 

If you have a back yard you should grow some vegetables.  It is simple and it will save you some money.  I will tell you how I used to grow vegetables cheaply in suburbia with limited space and give you an idea of how much money it saved us.

Heirloom tomatoes - one days harvest

Growing Vegetables in the backyard to save money

When we first bought a house with a small yard I put in a small vegetable garden, I sat and thought before each purchase as I wanted to save money.  I tried to make sure that everything I bought would return the investment in 3 or less years, if anything would not return that investment I asked myself if I really wanted it.  Sometimes the answer was still yes.  Why did I choose 3 years, I cant remember, it is just the rule that I go by when making purchases.

When I was about to start that garden I looked for something to make it from for free.  We had a sandpit in the lawn left behind by the previous owner, I dug out the sleepers and used them as the vegetable garden edging.  I dug over a section of lawn that was out of the way, put in the sleepers as edging, and included some of the old sandpit sand to improve the drainage.  It cost me time which I otherwise would have spent in front of the television, and I bought a cheap spade and wheelbarrow (which I needed to buy for other projects), but other than that it was free up to this point.

I needed to buy some vegetable seeds or seedlings to plant, this was my first real cost.  I decided seeds were cheaper than seedlings and offer the best return on my investment.  A packet of tomato seedlings costs about the same as a single tomato plant and can be used to grow many tomato plants over several years.  I also decided that any seeds I bought must be of things that I could grow out and save seed from each year or of something perennial that would not need replacing each year.  This makes seed buying a once off expenditure so even if they never break even they will still be providing me food for years to come.  At that stage I had no intention of ever selling seeds or breeding my own superior varieties, I was only planning on saving a little money by growing vegetables in my spare time.  Saving seeds lowers costs dramatically, you should save some seeds for yourself.

I normally dont include costs and things in blog posts as they vary from place to place, but to demonstrate how growing vegetables in the backyard is far cheaper than buying them from a shop I am going to include some dollar amounts here.  I am also going to try and be realistic and include things where you may lose money.

Yellow pear tomato, seeds are cheap and yields are high

Benefit/Cost comparisons of growing vegetables in the backyard versus buying vegetables

I payed $3 for a packet of tomato seeds so I wanted to get at least $3 of tomatoes in less than 3 years.  That was my goal, everything had to break even within 3 years.  I cant remember how much each plant produced, or how many plants I grew that first year, but all together they returned about 12 kg of fresh tomatoes.  According to this site one kilogram of tomatoes costs about $5.  Not surprisingly one single tomato plant returned a lot more than $3 worth of tomatoes in a single season.  I am not talking organic gourmet tomato prices (even though I grow everything organically and I probably have what is considered gourmet varieties), I always calculate using the cheapest vegetable I can find.  I then saved seeds from those tomatoes and actually still have that variety today.  That was 12kg of tomatoes the first year for $3.  Already, with that one purchase of tomato seeds, I had lowered the costs of my fruit/vegetables a tiny bit.  I was already ahead.  We were already saving money by growing vegetables.

If you are not breaking even in under 3 years you are doing something wrong, perhaps you are growing the wrong variety or perhaps tomatoes or whatever it is are not suited to your climate and you should grow something else.

When I payed $7.50 for a kilogram of seed potato that first year I wanted to get at least $7.50 worth of potatoes in under 3 years.  The first year that 1kg of seed potatoes returned 20kg of good sized potatoes plus a few kg of smaller ones that I saved to plant the following year, the second year they only grew 15kg of large potatoes plus some to save, the third year they yield 8kg.  Thats right, I keep pointlessly accurate records of things like this.  So for an initial $7 investment I got 43kg of potatoes over 3 years, not too bad.  Again, if you are not at least breaking even you are doing something wrong.  The average price of potatoes is around $3.78 per kg, so around 2kg breaks even.  The $7.50 for seed potatoes was well worth the investment especially considering the 20kg return the first year.  It is not difficult to save money by growing your own food in a small backyard garden.

That first year we spent $10.50 on tomato seeds and seed potatoes and ate around  $135.60 worth of fresh produce.  It is not difficult to see how much money can be saved by growing a few vegetables at home.

Perennial leeks, plant once harvest forever

We grew a few other things that first year, almost all of them returned far more than I payed for them.  Beans and snow peas grew tremendously well that year and I saved seed to grow in following years.  As well as providing a delicious crop, being legumes they also sequestered nitrogen from the air and made the soil more fertile and productive which was an added bonus.

Some seeds I bought did not provide great yields in that tiny vegetable garden.  It is important to know that this is going to happen too.

I bought multi coloured carrot seed, they grew well but when carrots cost $0.65 per kg I did not get $3 worth of carrots out of them that first year due to lack of space.  I probably got about 50 cents worth of carrots.  I saved some of their seed and planted the following years, to be honest I dont think I ever got $3 worth of carrots from them and should have probably stopped growing them.  You need to grow a lot to break even when they cost so little from the shops.  Space was the limiting factor there.  I was not saving money by growing carrots so I stopped growing them and used the garden space for more productive and worthwhile crops.

I bought an apple tree in our second year to plant by the fence, after counting and weighing the apples that we ate from that tree (I cant help but to weigh, measure and record certain things) and factoring in the cost of apples of the same variety from the shops I found that I broke even part way through the second year.  There is no point using the cost of organic apples as I would not buy them, I would buy the cheaper ones.  

I was also given some strawberry plants which performed wonderfully, it is difficult to work out how much they saved us as I would never buy strawberries because they are too expensive and do not taste very good.  These plants did replace other "afternoon tea" and "dessert" type foods so actually did save us a decent amount of money.  Considering that they cost me nothing to begin with I was more than pleased.

Herbs are worth growing, but they probably dont save you money

I also bought some herbs, this is where costing got even trickier.  Normally I would never buy fresh herbs as they are too expensive, so no matter how productive the plants were they would never truly break even.  This is ok when you factor it in with other things that actually did lower costs.  It is good to know that there will be things that are worth growing that will never break even, it is wise to make informed decisions about such things.  Lets be honest here, growing ornamental flowers never breaks even yet they are a multi-million dollar industry in Australia.  I think growing a few herbs is a great idea as they taste great, it should be a once off purchase as many herbs are perennial and it is simple to save seed from most annual herbs.

Then I bought some things that I had never seen in the shops, things like yacon.  I figured this was dead money as it was not replacing anything I would (or even could) buy.  I was willing to proceed as everything else had grown so well and lowered costs.  The trick here is not to ensure that each individual plant breaks even, but to make sure if something will lose money that you are aware of it before hand and have accounted for it somewhere else.  

The yacon grew amazingly well, the kids and I love to eat it.  It had saved us no money as it was not even replacing some other fruit or vegetable.  Yacon roots secrete sugars into the soil and attract and feed beneficial soil life such as earth worms.  Everything that grows near yacon seems to be larger and healthier, so it probably does save us money in some way that is too difficult to calculate.  Yacon is a perennial vegetable and I still have that same yacon growing today, it is one of my all time favourite vegetables.  I believe it was money well spent.

Production costs of growing vegetables in a small suburban backyard

People often complain about all the hidden costs which I have conveniently ignored so far, what about fertilisers, pesticides, herbicides, water and most importantly time?  Again I say if you are not saving money by growing vegetables then you are doing it wrong.  Lets look at these hidden costs.

Fertiliser

People often complain about the cost of fertilisers when growing their own food, I have never used them.  You dont need to use them in a backyard, it is cheaper not to.

When we lived in town I would compost the lawn clippings as well as tea bags, egg shells and whatever vegetable scraps we had and use that as fertiliser.  It was virtually free as we were using an otherwise wasted resource and the vegetables grew tremendously well with that as the only fertiliser. The soil got richer and more fertile each year, this cost us nothing.

After a while we got chickens and also used their manure and bedding as fertiliser.  Someone gave us their old guinea pig, this little guy worked tirelessly eating weeds/grass and turning that into manure.  He lived a long life with us, reaching a ripe old age of about 7 eating nothing but grass and weeds and producing high quality fertiliser for us.  I miss him, he was a hard worker and a placid friend for my children.

There is no need to spend money on fertiliser as you will have something around that you can use for free.  I can understand large acreage buying fertilisers, but if you are spending money on fertiliser in town you are doing it wrong.

Chickens, a great source of manure (dont worry they did not live like this for more than a few minutes, we were only carrying them from the incubator to the brooder and this tiny box was the safest and easiest way)

Pesticides

People often complain about pesticide costs, again I have never used them.  If a plant gets hammered by insects then perhaps I should grow something else.  There is no point beating a dead horse, sometimes it is wiser to cut your losses and grow something else. 

Some pests can be beaten using other means, others sadly can not.  Cabbage white butterflies for example do not like to like to lay eggs where there are a lot of other white butterflies.  I tie some string running along the length of the bed next to the brassicas.  I then cut white plastic bags into small rectangles and tie them in their middle along the string.  The end result looks like a heap of butterflies fluttering along the crop in the wind.  Dont be fooled,  this does not eliminate the pests, but it does reduce them to a sensible number.  We went from several dozen caterpillars per leaf of every plant, which I was removing each day, to only 1 or 2 per entire row of plants.  This cost me a little time, an old plastic bag and a length of old string that I found in the garage. 

I keep slugs and snails away from seedlings by surrounding them with crushed egg shells.  Apparently the slugs/snails find them too sharp and do not go over them.  This has to be reapplied every now and again as birds or something steal the pieces of shell.  Egg shell is virtually free, my chickens and ducks lay eggs which we eat or hatch and I use the shells either in compost or to protect seedlings.

Crushed egg shells protect seedlings from slugs and snails

Herbicides

People ask me "what about weeds and weed control?".  In a back yard you should not have weed trouble that you can not dig out easily enough.  Large scale broad acre farms may be different, but in a back yard if you can not dig out a weed something has gone wrong.

If you have chickens or guinea pigs they can be put on a vegetable plot between crops to eat out weeds and fertilise the soil for you.  Chickens can be very destructive in the vegetable garden so I would only use them between crops and I would be careful they do not scratch all the soil out of your garden.

I dont see the point of using a herbicide in a small backyard vegetable garden.  If you do not have chickens or guinea pigs then pull out the weeds yourself, dont spray them.  If you can not pull out the weeds yourself due to ill health or something consider mulching heavily with newspaper or something.  People will give you piles of newspaper for free if you ask.

Water 

People often drone on and on about how much they will spend in water if they grow vegetables, in a small backyard this is not the case.  When we lived in town water cost $0.55 per kiloliter, I dont know how many thousand liters I would have used watering my tiny patch but all up it would have added up to maybe a few dollars each year.

The cost of water is undoubtedly a lot higher these days and would certainly vary from town to town, even so you would probably be looking at the cost over an entire year in single digits.  This is not a large cost and can easily be factored in to a productive vegetable garden.  There is certainly no point complaining about such a small cost each year when the financial benefits are so great.

Duck potatoes growing in a bucket.  Water is cheap, duck potatoes are expensive

Time

I can not put a dollar amount on your time, I also cant tell you how long you will spend gardening each week or total over a year.  This will depend on how much time you are willing to spend out there.

People often talk about how gardening is great exercise and excellent for good health.  Others tell me that they find gardening therapeutic.  Some people claim that the clean, organic, nutrient dense food they produce will save them medical costs, doctor visits and give them greater quality of life when they are older and less sick.  I dont know about this so can not comment.

I cant tell you the benefit/cost ratio regarding time in growing your own food in the backyard.  I dont know anything about that, but I do often think perhaps my time is better spent growing my own food rather than working so that I can pay someone else to grow it for me.  When we lived in town the time I spent in the garden was just time I otherwise would have spent in front of the TV.

I can grow a lot of things that I can not buy in the shops, and I can grow other things that are best fresh.  Some things such as sweet corn only taste their best when eaten within 15 minutes of being picked.  After that the sugars convert to starch and you lose a great deal of quality.  The time it takes to drive home with your fresh corn from the shops is enough to stop it tasting its best.  I find that the small amount of time required to grow corn is more than worth it when it tastes so good.

Sorrel, you dont find this at the shops

Yacon, more than worth a little time to grow this at home

How much food can you produce in an average backyard?

Back in the old days most people grew most of what they ate, but back then life was easier and the world was a vastly different place.  House blocks were generally a lot larger and people had a great deal more spare time, it was quite rare for both husband and wife to have payed employment outside of the house.  Producing meat in your backyard was seen as pretty normal back then, today if you even consider butchering a chicken you would be frowned upon.  Back then people rarely bought much food, unfortunately times have changed.

If you wanted to you could probably produce all of your fruit and vegetables in your yard, but few of us have the time, the space or the inclination to do that.  Your yard would no longer be useful for anything other than producing food.  You are better off just growing some things that you like, still having a pretty normal looking yard that is still functional, and saving a heap of money along the way.  A 1m by 4m plot along the fence can be tremendously productive.

When we were in town we had two vegetable plots which were just under 2m x 2m, about 7.5 square meters together.  That small amount of land produced about 10% of our vegetables.  For 5 weeks each year we did not buy vegetables at all, then we got a few handfuls of vegetables throughout the rest of the year.  You can see how such a small amount of land can save you rather a lot of money.

I personally think that if you are not saving money by growing food then you are doing it wrong!  If you have tried and things are not going well talk to someone who may be able to help.  Just like the carrot example above you may need to change your plant choices.

Where to get heirloom vegetable seeds and perennial vegetables

There are many places that sell seeds and perennial vegetables.  Whenever buying please look at things that will either be perennial and grow for multiple years, or things that you may be able to save seeds from.  By doing this you will lower your costs as they will be a once off purchase.  Some things will be too difficult or time consuming to save seeds, that is ok too as long as you are aware of it and are saving seeds from other things.  Try to pick varieties that are different from what you can buy, many varieties that are available in shops are excellent for large scale farming and distributing over large distances but are not great for home gardens.  The aims of a home vegetable garden are different to that of a broad acre monoculture.

I sell some perennial vegetables and heirloom vegetable seeds through my for sale page and can post at cost to most of mainland Australia (not Tasmania or WA).  There are many other good small home seed sellers, as well as some larger ones that are good.  If you deal with the smaller family run seed sellers they are more likely to offer advice if something goes wrong as well as give you fresher seeds.  One of the largest and most well known heirloom seed sellers in Australia is dreadful, and ebay is very hit and miss, so do some research prior to buying anything.

You have little to lose and a lot to gain, grow some vegetables and save some money.

1 Thessalonians 4:11 and to make it your ambition to lead a quiet life: You should mind your own business and work with your hands, just as we told you,

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What is the Difference Between Bio and Non Bio and why does it matter

When two forces in the universe secretively combine to test your scientific brain you learn the incredible value of those lessons covering scientific thinking back in the days. Im not even talking about early uni days, I mean when I was 10 years old and my teacher sent us home with an assignment to describe a simple scientific thinking process. Something simple we observed at home or on our way home. I was confident I was going to be awesome for I was by then an excellent student. I was also a very inventive child that counted on my personal report with electrocution by the age of 8 and a serious bacterial poisoning by the age of 6. Apparently by then two electrical wires attached to a nail do not work as a lamp magnet, and the raw egg mixture Rocky Balboa drank cannot be kept under ones bed for days.

Tough life my bulb-has-no-light-because-its-broken example did not account for the fact that maybe the Power Station was down that day! Tears invaded me as I learned a much valuable lesson: Humility, observation, discussion. These are stepping stones for a proper scientific approach.

This lesson helped me adapt to the inconvenient mysterious and secretive combination of two universe forces that united strengths to make me, for a period of 15 days, a very worried father.

When my son suddenly appeared with plain red patches resembling mild edemas all over his body, my overprotective father software kicked out. My wife started blaming different bacteria, virus, read long pages of "Parenting is for Pros" websites. But by the end of those 15 days we couldnt understand this sudden rash-type plain red edemas that would emerge all over his skin, stay for 10-15 minutes and then vanish like they never were.

It was after bombarding myself with extensive literature on the many stupid things kids tend to catch, and after visiting a GP that reinforced everything was alright and surprisingly no Paracetamol (a GPs best friend) wasnt a necessary therapeutics, that I accepted I could not figure out what that was.

The kid was not getting better but he wasnt complaining of anything either. It was just those red plain edema-like patches surging from nowhere to invade his whole body, stay for a quarter of an hour and then leave like it has never been there at all. Luckily nothing resembling meningitis. We did the classic glass test; he is even vaccinated for the type C strain though.

What could that be if not two mysterious simultaneous forces in the universe that combined to piss me off big time. One had been triggered by myself and the other one by his nursery. WE HAD BOTH CHANGED DETERGENTS AT THE SAME TIME.

I honestly had thought of that before and even tested him with a cotton bud and a sample of the new detergent we had, but seems like these tend to change from brand to brand. Very little changes can trigger allergic reactions, but in fact what happened is that both us and nursery had changed from non-bio to bio detergent. 

I always had in my mind that bio would be better. I mean, bio... ermmmm... biological, isnt that so? Non-bio... ermmm... non-biological, therefore not organic at all. Quite a stupid uneducated consideration have I realised, only after reading the available brand literature on the subject.

(click on images to enlarge)

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Overwintering vegetable plants

We have some perennial vegetables which I decided to overwinter.  We moved in Spring so I have not had time to make a post about them until now.  We had the coldest winter since we have lived here and lost a lot of frost tender plants that I normally can overwinter with no effort.  I took a few pictures of some of the survivors.  Most of these plants are far larger now.

Kangkong (Ipomoea aquatica)

This is a heat loving tropical perennial leaf vegetable which is often grown as an annual in cooler climates.  It grows well from seed, but I wanted to see if overwintered plants were larger than seed grown and it appears that they are.  It has many common names and is related to sweet potatoes.  I am not overly fond of leaf vegetables, but I like kang kong.  Unlike many other leaf vegetables it never goes bitter, it can be eaten raw or cooked.  I have only eaten it raw and it tastes nice, apparently cooked it tastes a lot like spinach.

I grew it in too small a pot so it did not reach anywhere near its potential last summer.  I tried to grow it in a fish talk as a floating water plant but there was not enough sunlight and it appears to prefer at least some soil for its roots.  It tried to flower but then winter came and the cold cut it down to a stump.  I do not want to save and plant seed each year if there is an easier way and this plant grows easily from cuttings.  I am glad that this can be overwintered as it is simple and the plants are larger than seed grown.

Once the warmer weather came along it started to grow fast again.  I wish I knew about this plant years ago as it is great.  It dislikes the cold weather and dies back badly even without frosts but survives and grows very fast once the days are warm.

Kangkong resprouting in late winter, it dislikes the cold air even when protected from frosts

The same plant in Spring after being cut back a few times

Chilli - Trinidad Scorpion Butch T
Most varieties of chilli available to home gardeners can be overwintered easily enough.  Super hot chilli are a lot more finicky than regular chilli and capsicums from what I have heard.  Being the first time I have grown the super hot chilli I decided to try and overwinter it rather than start from seed again.  Strangely it went very well and was very easy.  I tried to keep it out of the frost at night and put it in the sun during the day when I remembered.  I accidentally let it get a bit of frost a few times and forgot to put in in the sun more often than I remembered and all three survived nicely.

Trinidad Scorpion Butch T in tiny pot

Super hot chilli in late winter - not many leaves

Strangely healthy chilli in winter

The same plants after the weather got warmer

Trinidad Scorpion Butch T

Tomatoes
Indeterminate tomatoes
Most indeterminate tomatoes are simple to overwinter if the frost can be kept off them.  This year was colder than most and I lost most of the tomatoes I had planned to overwinter as I did not look after them all that well.  I grew one seedling far too late  in the season last year so decided to try and overwinter it.  Mid winter, with no heat, just moving it inside at night to avoid frosts the plant started to flower.  The flowers all fell off as it was too cold for pollination to occur but the plant was mature.  This meant that it is easy to plant them out when the weather warms and have them set fruit almost right away.

Tomato plant mid winter

Micro Tom tomatoes
Micro tom is a great little tomato variety that needs more people to grow it and save its seed.  I grew one on the kitchen window over winter to see how it would go.  Apparently they grow just fine over winter if kept inside and this one started to flower when the nights were still frosty outside.  They have such a short lifespan that this particular plant flowered, set fruit and died before Spring came.  What a great plant, while it may not be the tastiest tomato variety it was a lot better than any cherry tomato I could buy from the supermarket at that time if year.  They are not terribly productive but being so small means that it can grow in a tiny pot and not need much space to provide a crop.  Being able to bring them indoors at night means that it is possible to get them to set fruit in Winter, I never would have thought that getting fruit in Winter was possible for a tomato that is not parthenocarpic.

I also planted some Micro Tom seeds mid winter to see if they would germinate in the cold and they did.  Being such tiny plants the kids adore them.  They are even more happy to eat the tomatoes and they tend to carry the tiny plants around talking to them and treating them like pets rather than plants.  The more I grow Micro Tom the more I discover about them that shows me how good they are.

Micro Tom tomato flowering in mid winter

Vietnamese Coriander (Persicaria odorata)
This perennial herb has many, many common names.  It smells a lot like coriander and is far simpler to grow.  It does not bolt to seed like real coriander and does not even flower often outside of the tropics.  It appears to love water and I grow it as a bog plant or an emergent water plant.  It does not like frost, mine got frosted a few times but they all came back in the warmer weather.  Over winter they look terrible, as soon as the warmer weather returned they sprang back to life.  Cuttings strike very easily in water so once it warmed up I cut one plant into many pieces, the original plant grew back and each cutting grew roots within a few days.

Vietnamese coriander leaves turn a bit red in cool weather

Water Celery (Oenanthe javanica)

This is another emergent water vegetable, it is grown for leaves and stems that taste of celery or parsley.  Like many of the vegetables I grow this is a perennial vegetable that rarely flowers or sets seed.  I have the variegated form of this vegetable, while it is prettier than the regular green one it is also not as aggressive in its growth.  I would like to track down the regular green version one day and see just how strong it will grow.  I would prefer a productive vegetable to a pretty vegetable.

My plant grew with no winter protection, the top of the water was covered in ice many times.  It certainly did not love being covered in ice and died back somewhat, the smaller plants that were grown with protection from frost looked a lot healthier at the end of winter.  As soon as the heat returned it was very fast to recover.

Water Celery surviving winter with no protection.

Where to get perennial Vegetables
I have been selling perennial vegetable plants and some seeds for years.  Unfortunately we recently moved to town and do not have any land so will not be selling anything for a while.  We do plan on moving again very soon, when we have settled I hope to sell perennial vegetables and vegetable seeds again, they will be listed on my For Sale page when the time comes.

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Why Good Employees Leave

THIS IS A WARNING FOR ALL SUPERVISORS AND MANAGERS WHO REALLY CARE... NOT

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