Vegetable Yield Estimator

How to use the yield estimator

How much will a bed actually grow? It is the question every gardener asks, and the answer is always a range, never a number. This estimator gives you typical yields — pounds per plant or pounds per ten feet of row — from published extension ranges, and multiplies them by the number of plants or the row length you enter. The result is a planning figure: enough to decide whether six tomato plants will feed your family or bury it, and whether one row of beans is enough or three would be better.

How much is enough?

The numbers surprise most beginners, usually in the direction of too much. A single healthy tomato plant yields 10–15 lb of fruit — six plants is 60–90 lb, which is a lot of tomatoes for one household. Zucchini is the famous example: one plant gives 6–10 lb, and two plants are usually more than a family can eat, which is why experienced gardeners grow one zucchini and give the rest of the space to something else. Beans and peas work the other way: a 10-foot row gives only 4–6 lb, so if you want beans regularly, you need several rows or succession sowings. The estimator's job is to make those decisions before you plant, not after the glut arrives.

A useful rule of thumb is to grow what you actually eat, in the quantities you eat it, and to plant for the table rather than for the record books. Two or three tomato plants, a short row of beans sown every two weeks, a dozen lettuce plants in rotation, and a few herbs will feed most households through summer with far less waste than a bed planted with one of everything. If you want to preserve — freeze, bottle or dry — then grow more, but grow it deliberately: a row of tomatoes for sauce is a different plan from a few plants for salads, and the estimator lets you size it before you commit the space.

Why real yields vary so much

The range in the results is wide because the factors behind it are many. Variety is the biggest: a modern hybrid tomato bred for yield can out-produce an heirloom two to one, and a variety bred for your climate will beat one bred for somewhere else. Water is next — vegetables are mostly water, and a plant that is short of it at fruiting time yields less and tastes worse. Feeding matters, but more is not always better: too much nitrogen gives lush leaves and little fruit, especially in tomatoes and squash. Pests, disease, weather and spacing all play a part, and the single biggest factor is often the gardener's own consistency — regular watering, regular picking, and prompt attention to problems.

The practical way to use the estimator is to plan on the low end of the range and be pleased when the harvest beats it. If the low end of the range meets your needs, you have planted enough; if only the high end does, plant more or accept that you may fall short. Keep notes on what you actually harvest — a kitchen scale and a notebook for one season will give you yields for your garden, your varieties and your care, and those numbers are worth more than any published range. And remember that yield is not the only measure: a tomato you grew yourself, picked ripe and eaten the same day, is worth more than the same weight from a shop, whatever the scales say.

Related tools: work out how many plants fit with the Plant Spacing Calculator, lay out the bed with the Square-Foot Garden Planner, and find out when your crop will be ready with the Harvest Date Calculator. For what to plant this month, see the Garden Planner.