WhatoGrow

Family-size harvest calculator

Tell us how many people you feed and we'll estimate how many plants of each crop to grow, and how much bed space you need for a year's worth.

4
CropNeed/yrPlantsBed area
Tomato28 kg72.8 m²
Lettuce12 kg403.3 m²
Carrot20 kg2003.3 m²
Zucchini16 kg66 m²
Potato60 kg6012 m²
Capsicum8 kg82 m²
Cucumber12 kg62 m²
French Bean12 kg402 m²
Broccoli12 kg307.5 m²
Silverbeet16 kg162.7 m²
Onion24 kg1604.4 m²
Pumpkin20 kg510 m²
Pea8 kg542.2 m²
Beetroot12 kg802.7 m²
Total bed space62.9 m²

Yield figures are indicative home-garden estimates pending verification against ABS consumption data.

Common questions

How many tomato plants do I need for a family of 4?

As a rough guide, around 7 tomato plants covers a household of 4 for the season — about 2.8 m² of bed space. Adjust for how much you eat fresh versus preserve.

How is the number of plants calculated?

We multiply a per-person annual need (kilograms) by your household size, divide by the typical yield of one home-garden plant, then round up. Bed area comes from the usual planting density for that crop.

Are these figures exact?

They are indicative home-garden estimates. Real yields vary with climate, variety and care, so treat the result as a starting point rather than a precise target.