Is Growing Your Own Worth the Cost?

It can be worthwhile, but a harvest is not automatically a saving. Compare food you actually use with what you spend, then decide how much flavour, freshness, enjoyment and control matter to you.

By Simon Adams · Updated 25 October 2026

Choose the comparison honestly

Use the price of food you would otherwise buy, in the same season and in a comparable form. If you normally buy conventional produce, using premium organic prices will overstate your cash saving. If you normally buy an organic vegetable box, that may be the more relevant comparison.

Count the harvest that replaces a purchase. Food left unused does not reduce the shopping bill. Gifts may be valuable to you, but record them separately. Freezing or preserving can make a glut useful; include the energy, ingredients and time if they materially affect the comparison.

Separate the two kinds of spending

Seasonal costs: seeds or young plants, compost, feed, water, replacement materials and any energy used. Include plot rent and travel where relevant. You can total a whole growing area rather than forcing an artificial cost onto every seedling.

Equipment and setup: containers, tools, beds, supports and a greenhouse may last for years. Record their full purchase cost for a first-year cash view. For a longer-term comparison, spread a reasonable share over their expected useful life. Do not charge both the whole purchase and an annual share in the same calculation.

A worked example

Illustration only—not a yield forecast or current shop price. Suppose you use 3kg of a crop that would otherwise cost £8 per kg. The replacement value is £24. If seasonal growing costs are £10, that leaves £14 before equipment and time.

If you also bought a £20 container that year, the first-year cash result is £24 minus £10 minus £20: £6 more spent than the food replaced.

If that container lasts five years, an illustrative annual equipment share is £4. On that basis, the annual comparison is £24 minus £10 minus £4: £10 remaining before time. These are two different views of the same example. Replace every number with your own harvest, local prices and costs.

Include time without hiding enjoyment

Keep a rough record of sowing, watering, weeding, picking and preparing the harvest. You can report hours separately or place a value on them. In the example, five hours valued at £5 per hour would add £25 and turn the £10 annual margin into a £15 shortfall.

That does not decide whether you enjoyed those hours. It shows why “cheap food” and “a worthwhile hobby” need separate judgements. Record both rather than pretending time is either worthless or always paid work.

Improve the next season’s value

Start with crops you like and use regularly. Seed can reduce plant costs, but buying a few plants may avoid equipment and excess seedlings. Reuse sound containers, share suitable seed packets and expand only after checking what reached the table.

Do not dismiss a favourite crop solely because it is inexpensive in the shops. Freshly picked flavour, a variety you cannot buy locally and the pleasure of growing it can justify the space. State that reason clearly instead of calling it a financial saving.

Make one useful decision

At season’s end, choose one crop to keep, one expense to reduce and one experiment to try. A modest, useful harvest with costs you can manage is a better basis for expansion than a headline value calculated from everything the garden produced.