Greenhouse growing: cost per kilo, not kilos per square metre

«Two hectares under glass, thirty-eight kilos per square metre, the best yield in the district. And in July I sold my car to settle the gas bill» — that is how Ruslan, who owns a greenhouse operation near Cherkasy, opened the conversation.

Sound familiar? The greenhouse looks exemplary: the plants are even, the drip system works, the agronomist is pleased, the yield is up on last year. Lorries take the produce away, the delivery notes are signed, the gross harvest figure in the report looks good. And the account holds sums that will not even cover the next batch of substrate.

The reason is almost always the same. Growers measure themselves in kilos per square metre. It is the right agronomic unit and a completely meaningless financial one. Yield tells you how well you grow. It tells you nothing about what you earned, because it knows nothing about gas, and nothing about the precise week in which you reached the market.

In this article we break a greenhouse down into three different units: a square metre per cycle, a kilo of produce, and a day of boiler operation. Because in this business the money is decided not by yield, but by how much energy you burned while growing it and at what price you sold what you picked.

The founder's path: from a plastic tunnel to two hectares

Ruslan started with a single plastic tunnel on twelve ares behind his parents' house. The logic was simple: cucumbers grow fast, turn around in two months, and in winter they cost as much as meat.

For the first few years the arithmetic worked literally. He counted like this: picked this many kilos, sold them at that price, subtracted seed and fertiliser — the difference goes in the pocket. The tunnel paid for itself in a season, the second one did too, and in the fourth year he put up his first glass block on half a hectare.

That is exactly where the arithmetic broke. Glass meant heating, heating meant a boiler house, and the boiler house meant gas. And gas turned out not to be a cost line but a second business inside the first.

«In plastic I counted seed and fertiliser. Once the gas arrived, it turned out I am no longer a vegetable grower. I am an energy man who grows cucumbers on the side.»

What irritated him most was something else. He could not say which of the two blocks earned more. Both gave similar yields, both produced similar tonnages, but one constantly «asked» for money and the other did not. The report held a single figure for all of it: gross harvest.

Why «kilos per square metre» says nothing about money

Yield is an excellent measure of the agronomist's work. It shows how well the hybrid, the lighting, the irrigation and the feeding regime have been chosen. The problem starts when that figure is used as a financial one.

Thirty-eight kilos per square metre is very good. But those thirty-eight kilos can produce either a hundred and thirty-six hryvnia of profit per metre or minus a hundred and seventy. The difference is not agronomic. The difference is how much gas you burned and in which week you cut the first fruit.

As long as you measure yourself by yield, you are optimising what is already good and missing what is actually killing you.

Life before the numbers appeared

Before we get to the calculations, it is worth describing the state Ruslan lived in for almost four years. It is recognisable for practically any operation that has grown from one greenhouse to several blocks.

• Money was counted by the balance in the account. There is money — everything is fine. There is none — we need to hold out until the next lorry.
• Gas arrived as a bill once a month and felt like a natural disaster: the amount became known after the fact, and by then nothing could be done about it.
• All the blocks were one greenhouse. Gross harvest was counted together and so were the costs — so comparing blocks was impossible in principle.
• The decision to «hold on another two weeks» was made by the agronomist, not the owner, because it looked agronomic rather than financial.
• Sales were a single figure called «revenue», with no split between the retail chain, the wholesaler and the market, although their terms differed radically.
• Every July the working capital ran out, and every year this was explained away as «a hard season», although it repeated to within a week.

Not one of these problems was agronomic. All six were accounting problems — and that is precisely why neither the agronomist nor the bookkeeper closing the quarter ever saw them.

What a square metre actually costs per cycle

Take a real block: two thousand square metres, cucumbers, a winter-spring cycle. Yield of thirty-eight kilos per metre, an average selling price of forty-two hryvnia a kilo. Revenue from one metre: ₴1,596.

What everybody counts

In any business plan you will see three lines: planting material, substrate with fertiliser and plant protection, and labour. Together that is ₴585 a metre. What is left is ₴1,011 — and this is the figure owners quote when they say «our margin is about sixty per cent».

What is usually missing from the business plan

Now let us look at the same metre honestly.

Item per 1 m² per cycle	In the business plan	In reality
Revenue (38 kg × ₴42)	₴1,596	₴1,596
Seed and seedlings	₴95	₴95
Substrate, fertiliser, protection	₴180	₴180
Labour: planting, tending, picking	₴310	₴310
Gas and electricity for heating and lighting	—	₴620
Packaging, pallets, delivery to the sales point	—	₴140
Depreciation of structure, boiler house, equipment	—	₴115
Left for the owner	₴1,011	₴136

Eight hundred and seventy-five hryvnia of difference on every square metre. Across two thousand metres that is one million seven hundred and fifty thousand hryvnia per cycle — exactly the sum that is missing every summer when it is time to calmly enter the next one.

Convert that into cost per kilo: ₴1,460 of costs divided by 38 kilos is ₴38.4 a kilo. At an average price of ₴42 you earn three hryvnia sixty kopecks per kilo. Not forty-two. Three sixty.

Gas: thirty-nine per cent of revenue that does not depend on the harvest

Six hundred and twenty hryvnia out of one thousand five hundred and ninety-six is thirty-nine per cent of revenue going on energy. No other line comes close.

But the size is not the main thing. The main thing is the behaviour. Gas does not depend on how much you picked. It depends on how many days you held the required temperature and how many hours you ran the lamps. If the harvest failed, the gas burned all the same.

«The boiler does not ask how much fruit you have set. It heats a volume. Minus five outside costs the same for the best block and for the one where something went wrong.»

That is exactly why the logic of «I will sell less, so I will spend less» does not work in this business. Here almost every cost has been incurred before you find out what you are actually selling.

What happens if the yield drops by a quarter

Suppose the cycle went worse: a disease outbreak, a lighting failure, two weeks of poor pollination. Instead of thirty-eight kilos you picked thirty.

Revenue per metre falls to ₴1,260. And the costs? Seed, substrate, labour, gas and depreciation stay almost the same — ₴1,320. Only packaging and delivery shrink, in proportion to the harvest, to ₴110.

That is ₴1,430 of costs against ₴1,260 of revenue. The result is minus ₴170 per square metre, or minus three hundred and forty thousand hryvnia on the block.

The difference in yield is twenty-one per cent. The difference in the financial result runs from plus two hundred and seventy-two thousand to minus three hundred and forty. That is what a high share of fixed costs means: a small deviation in agronomy turns into a large deviation in money.

The kilo: the second unit, and it moves

The first unit is the square metre per cycle. The second is the kilo. And the defining feature of the kilo is that its price changes faster than you can react to it.

You roughly know the cost per kilo at the start of the cycle: it follows from planned yield and planned costs. The selling price, however, becomes known on the day you cut — and it is the price that decides whether the cycle was profitable.

The price calendar: what the market is actually paying for

Why the price falls the way it does

In winter, greenhouse cucumbers compete with themselves and with imports: supply is limited to those willing to pay for gas and light. From March the southern regions join in with cheaper heating, in April unheated plastic houses arrive, and in May open ground is added. Each new entrant has a lower cost base than you, so the price does not drift down — it steps down.

Here is what that looks like in money, and what remains from a kilo at a cost of ₴38.4.

Month of market entry	Price per kg	Result per kg
January	₴95	+₴56.6
February	₴78	+₴39.6
March	₴52	+₴13.6
April	₴33	−₴5.4
May	₴22	−₴16.4

The same greenhouse, the same yield, the same cost base. The difference between a January kilo and a May kilo is seventy-three hryvnia. Across seventy-six tonnes that is five million five hundred and forty-eight thousand hryvnia of difference that has nothing whatsoever to do with how well you grow.

«For about five years I thought I was competing on yield. Then I realised I am competing on a date. Whoever got in during January took the money, and in May we all hand it over at twenty-two together.»

Ten days late costs more than all the substrate

Take a specific situation. You planned to start cutting on the twentieth of February, but the cycle slipped by ten days because the seedlings were delayed.

The main harvest wave moved from the second half of February into early March. The average price of your cycle drops by roughly ten hryvnia a kilo. Across seventy-six tonnes that is seven hundred and sixty thousand hryvnia.

For comparison: all the substrate, fertiliser and plant protection for this block cost three hundred and sixty thousand. In other words, ten days of calendar cost more than twice the entire annual nutrition budget.

This is the single most important conclusion of the whole article. In greenhouse growing, the calendar is not an organisational question. It is the main financial variable.

A cycle that ran long: how days turn into money

There is a mirror image of this. A cycle can be not only started later — it can also be dragged out longer.

Gas per metre per cycle is ₴620, and the cycle lasts roughly a hundred and fifty days. That is ₴4.1 per metre per day. If you hold the crop three weeks longer to «pick up tonnage», you burn an extra ₴87 per metre — a hundred and seventy-four thousand hryvnia on the block.

The question is simple: do those extra tonnes, harvested at the worst price of the season, cover a hundred and seventy-four thousand of gas? Usually not. But while gas sits as one sum at the end of the month rather than broken down per day, this decision gets made on instinct.

Labour: a peak and a trough inside one budget

Three hundred and ten hryvnia per metre of labour looks like a flat figure in the table. In real life it never is.

• Planting. A short burst; you need many hands for a few days.
• Tending. An even load on a small permanent team throughout the cycle.
• The picking peak. Three to four weeks when you need twice as many people as you have — and when your neighbours need exactly the same thing at exactly the same time.
• The off-season. The block stands empty, but you keep the permanent staff, because otherwise you will not assemble a team next time.

If you do not count labour by phase, you cannot see that half the annual payroll falls into three weeks — and that it is in those three weeks that you run short of working capital every year.

Chain, wholesaler or your own market: three different sales economies

The same kilo can be sold in at least three ways, and they are three different businesses with different cost bases. The most common mistake is to count them as one figure called «revenue».

Why the price on the invoice is not what you received

The chain gives you volume and predictability, but demands grading and packaging, returns what did not sell and pays on deferred terms. The wholesaler takes everything at once and without conditions, but at a lower price. Your own market stall gives the highest price but eats people, transport and your time.

Here is how it looks once each channel is taken down to a net price per kilo.

Channel	Price on the invoice	Net price per kg	When the money comes
Retail chain	₴44	₴35.9	in 45 days
Wholesaler	₴38	₴37.1	on delivery
Own market stall	₴55	₴44.2	the same day

In the chain, ₴4.2 of the forty-four goes on packaging and grading, ₴1.8 on returns of unsold stock and ₴2.1 on delivery to the distribution centre. With the wholesaler, only ₴0.9 of logistics comes off the thirty-eight. At your own stall, ₴2.4 of transport, ₴5.6 for the seller and ₴2.8 of losses on unsaleable appearance come off the fifty-five.

And here is the result that breaks intuition: the channel with the highest invoice price turned out to be the worst. The chain pays ₴44 and delivers ₴35.9 — less than the wholesaler you supply «cheaply». Plus forty-five days during which your money is frozen.

«A retail chain is not a buyer. It is a loan you extend, and you pay for the packaging on top.»

Why you still cannot simply walk away from the chain

Because the chain absorbs volume at the picking peak, when your own stall physically cannot eat seventy-six tonnes and the wholesaler drops the price in those same weeks, since everybody is delivering. The right answer is not to walk away but to know the net price of every channel and decide deliberately how many tonnes go where in which week.

What changed once the metre and the kilo were counted separately

Ruslan did three simple things. He split costs by block rather than by farm. He divided gas by day and started seeing it weekly rather than once a month as a bill. And he separated sales into three channels with their own cost per kilo in each.

Within one cycle this became visible:

• The older block was running at zero. The same yield, but thirty per cent more gas per metre because of worn glazing and an old heating circuit. The fix was not a new greenhouse but a thermal screen.
• The April top-up was loss-making. Three weeks of «picking up tonnage» cost a hundred and seventy-four thousand in gas and produced fruit at thirty-three hryvnia.
• The chain was the worst channel. Allowing for packaging, returns and deferred payment, a kilo to the chain brought in less than one to the wholesaler — for twice the hassle.

None of these decisions required a new hectare or a higher yield. They required seeing the metre, the kilo and the day separately.

In the following cycle the block's result moved from ₴136 to ₴214 per square metre — at the same yield. The thermal screen on the older block cut gas by eighteen per cent, dropping the April top-up freed three weeks and a hundred and seventy-four thousand, and redistributing tonnes between channels added roughly one and a half hryvnia to the average net price per kilo.

Insight for owners. In a business with a high share of fixed costs, your financial result is determined not by how well you work but by how precisely you hit the calendar. Agronomy sets the ceiling. The entry date and the cost of a day decide how much of what is under that ceiling you keep.

A few closing tips

• Count the result of a square metre per cycle, not the yield. Yield is the agronomist's metric, not the owner's.
• Work out the cost per kilo before the cycle starts and keep it in front of you — it shows which month you are still earning in and which one you are not.
• Break gas down per day. While it remains a monthly bill, decisions about extending a cycle are made blind.
• Price the cost of a ten-day slip. For most operations it exceeds the entire annual nutrition budget.
• Run every block separately. Two blocks with identical yields can differ by a third in gas.
• Count sales channels separately, with packaging, returns and payment terms. A kilo to the chain and a kilo to the wholesaler are different kilos.
• Plan labour by phase. Half the payroll falls into the three peak weeks — that is exactly where the cash gap appears.

Money does not disappear — you simply do not see it

A greenhouse looks like a business in which agronomy decides everything. In fact agronomy decides the ceiling, while the money is decided by energy, the calendar and the sales channel.

None of these costs disappears on its own. But the moment the square metre, the kilo and the day become separate units, it becomes visible which block feeds you, which week costs half a budget — and what to do about it in the very next cycle.