Getting your sowing rate right makes a real difference with cover crops. Too little seed and you get patchy coverage that lets weeds establish — too much and you're wasting money. Use this calculator to take the guesswork out of it. Simply enter your growing area, select your cover crop, and we'll tell you exactly how many grams you need and which of our pack sizes covers your plot.
All sowing rates are based on standard UK broadcast rates for home growers and allotments. If you're sowing in rows rather than broadcasting — as with field beans or forage peas — the calculator notes this and the rate accounts for it. Once you've got your quantity, click through to buy directly from the results.
Select your cover crop, enter your growing area, and we'll tell you exactly how much seed you need — and which pack size to buy.