How accurate are these yield estimates?

These are average UK yields for well-managed plots. Actual yields depend on soil quality, weather, variety, and how well you tend the crops. Experienced growers can exceed these figures.

What gives the highest yield per m²?

Tomatoes, courgettes, and onions are among the highest-yielding crops per square metre. Potatoes give good weight but need more space.

How do I improve my vegetable yields?

Good soil preparation, regular watering, proper spacing, timely feeding, and pest control all improve yields significantly.

Which vegetables are best for beginners?

Courgettes, runner beans, lettuce, radishes, and potatoes are all forgiving crops ideal for new growers in UK conditions.

What affects vegetable yield the most?

Soil quality, consistent watering, sunlight (6+ hours), and feeding are the biggest factors. Protected growing (greenhouse/fleece) and succession planting also boost total harvests.

GardenCalcs

Crop Yield Calculator — Estimate Vegetable Harvest

Estimate harvest yields for common vegetables based on growing area.

Crop

Growing Area

Growing Experience

How We Calculate This

Yield = Area x Yield per m² x Skill Factor. Average yields are based on UK growing conditions with typical varieties.

Skill factors: beginner 60%, average 85%, experienced 100% of optimal yield.

Plant counts are based on recommended spacings. Harvest window shows how long the crop typically produces for.

Frequently Asked Questions

Related Calculators

Vegetable Plot Size Calculator

Work out how big a veg plot you need to feed your family.

Raised Bed Vegetable Calculator

Plan what to grow in a raised bed with spacing and yield estimates.

Allotment Planner Calculator

Plan crop rotations and plot layouts for allotment gardening.

Potato Chitting Calculator

Calculate seed potato quantities, spacing, and chitting times.

Runner Bean Calculator

Work out cane quantities, spacing, and expected yields for runner beans.

Last updated: February 2026

All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.