Vegetable Yield Calculator

Frequently Asked Questions

How much can I expect from a 100 square foot vegetable garden?

Yield varies widely by crop. A 100 sq ft bed can produce roughly 100 lbs of tomatoes, 30-40 lbs of beans, 150 lbs of zucchini, or 35 lbs of lettuce per season for an intermediate gardener. High-value crops like tomatoes and zucchini often deliver the best return per square foot.

What factors most affect vegetable garden yield?

Sunlight is the single biggest factor - most vegetables need 6-8 hours of direct sun per day. Soil quality, consistent watering, plant spacing, pest control, and the timing of planting relative to your local climate all have major effects on final yield.

Which vegetables give the best yield per square foot?

Zucchini and summer squash typically produce the most pounds per square foot. Tomatoes, cucumbers, and beans also provide high yields. Root vegetables are moderate. Broccoli and cauliflower produce relatively few pounds per square foot but are high-value crops.

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Estimates for informational purposes only.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.

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How This Calculator Works

This calculator estimates the harvest weight from a garden bed using typical yield figures per 100 square feet for each crop at intermediate skill level. A multiplier adjusts the baseline up or down based on your experience level: beginners typically achieve about 60% of the baseline through learning-curve losses, while experienced gardeners can push 40% above baseline through optimized soil, timing, and variety selection.

If you enter a store price per pound, the calculator estimates the retail cost savings your garden produces, which helps you compare the value of different crops per square foot of bed space.

Factors That Affect Yield

The estimates here are reasonable averages, but actual yields vary considerably based on several factors:

Soil quality: rich, well-draining loam with plenty of organic matter produces noticeably more than compacted or sandy soil.

Watering: consistent moisture, especially during fruit set and root bulking, is the single biggest yield driver after soil quality.

Sunlight: most fruiting crops (tomatoes, cucumbers, peppers) need at least 6-8 hours of direct sun. Leafy greens tolerate partial shade.

Plant spacing: crowded plants compete for light and nutrients and typically produce less per plant, even if more per square foot early on.

Pest and disease pressure: a single fungal infection or aphid outbreak can cut yields by half or more if not caught early.

High-Yield vs Low-Yield Crops per Square Foot

Not all crops deliver the same garden value. Zucchini and squash are the highest-yield crops by weight, often producing 150+ pounds per 100 sq ft, but the retail price is low. Tomatoes produce 100 lbs per 100 sq ft at a moderate price. Broccoli and peppers yield less by weight but can have higher retail value per pound. When comparing crops for a small plot, consider both yield and store price together - which is exactly what the cost savings output shows.

High-value, high-yield choices for small beds: tomatoes, cucumbers, zucchini, and kale. Lower-value choices if space is limited: potatoes and broccoli (better grown at larger scale).

Worked Example

A beginner gardener plants tomatoes in a 4 ft by 10 ft raised bed (40 sq ft). Baseline yield for tomatoes is 100 lbs per 100 sq ft, scaled to 40 sq ft gives 40 lbs at intermediate level. Multiplied by the beginner factor of 0.6, the estimate is 24 lbs. At a store price of $2.50 per lb that is $60 in savings from a single 40 sq ft bed over the season - not counting the cost of seeds, soil, or water.

Tips and FAQ

How accurate are these yield estimates?

The figures represent realistic garden averages under decent conditions. University extension trial data and community garden surveys inform the baselines. Your actual yield may be higher or lower depending on variety, climate, and season length. Use the numbers as planning guides, not guarantees.

Should I grow the highest-yield crop?

Only if you can use that much of it. Zucchini is famous for overproducing - a single plant can supply more than most households need. Choose crops your household will actually eat, then check the yield and value figures to decide how much bed space to allocate.

What counts as bed area?

Use the total planted area, not the path around it. A 4 ft by 8 ft raised bed is 32 sq ft. An in-ground row that is 20 ft long and about 18 inches wide is roughly 30 sq ft.

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