Vegetable Garden Cost Calculator

This vegetable garden cost calculator estimates what a food garden costs to run for a season, and, if you want, whether it pays for itself. Enter the planted area, any one-time setup costs this year, seeds and transplants, compost, supplies and your watering season, plus your local water price. The calculator totals the season, shows the cost per square foot, and breaks out what the water actually costs. Add an expected harvest and a typical store price, and it will show the value of what you grew and whether the garden saved money this year.

How to use the vegetable garden cost calculator

1. Enter the planted area. Use beds only, not paths. The garden size calculator helps with odd shapes.
2. Enter one-time setup costs if this is a new garden, such as beds, soil and tools. Leave it at zero for an established garden. The garden cost calculator and raised bed cost calculator work out setup costs in detail.
3. Enter seeds and transplants. Count packets and plants, with the prices you pay.
4. Enter compost. About an inch a year keeps established beds healthy.
5. Enter supplies, such as fertilizer, mulch, stakes, row cover and twine.
6. Enter your watering season and water price. The default assumes you add three-quarters of an inch a week on top of rain for 20 weeks.
7. Optionally, enter your expected harvest in pounds and a typical store price per pound to see the value of your produce.

A typical season, worked out

With the default inputs, a 100-square-foot established garden costs roughly:

Two things surprise most people. First, water is usually a tiny part of the cost for a home garden. Second, compost and transplants are often the largest recurring expenses, which makes them the best places to save.

If that same garden produced 150 pounds of vegetables worth an average of $3 a pound in the store, the harvest would be worth about $450, and the garden would come out roughly $246 ahead for the season.

How much will a garden produce?

Yields vary enormously with crop, climate, soil, spacing, pests and the gardener’s attention, so treat any estimate with caution. Home gardens commonly produce somewhere around half a pound to a couple of pounds of vegetables per square foot over a season, with intensively planted, well-tended beds of productive crops at the higher end. A new garden in its first year, with soil that is still improving, is often at the lower end.

The best way to know your own yield is to weigh what you harvest. A cheap kitchen scale and a notebook by the back door are enough. After one season, you will have real numbers to enter, and a much better idea of which crops earn their space.

Which crops give the best value?

A crop’s value depends on two things: how much it costs to buy, and how much it produces in the space it takes. Crops that are expensive in stores and productive in a small area give the best return.

High-value crops

• Fresh herbs such as basil, parsley, cilantro and chives. Small supermarket bunches are expensive, and a few plants produce for months.
• Salad greens and leaf lettuce, harvested a few leaves at a time over many weeks.
• Cherry tomatoes, which produce heavily from midsummer until frost.
• Zucchini and summer squash, famously productive.
• Peppers, especially colored bell peppers, which are expensive in stores.
• Pole beans, which produce a lot from a narrow strip along a trellis.
• Kale and Swiss chard, picked for months from the same plants.

Lower-value crops

• Potatoes, onions and carrots are inexpensive in stores, so homegrown versions save little money, although many gardeners grow them for flavor and variety.
• Sweet corn takes a lot of space for one or two ears per plant.
• Winter squash and pumpkins need a lot of room relative to their store value.

That does not mean you should skip lower-value crops. Freshly dug potatoes and just-picked sweet corn taste remarkably different from store-bought. But if saving money is the goal, give most of your space to high-value crops. Our list of the 10 easiest vegetables for first-time gardeners happens to include many of them.

Where the money goes, and how to spend less

Transplants

Nursery transplants are convenient, but they are usually the biggest single cost in a season. Growing your own from seed under a simple light can cut that cost dramatically after the first year. A packet of tomato seeds can produce dozens of plants for the price of one or two transplants. See our guide on when to start seeds indoors.

Seeds

Buy only what you will use, store leftovers well, and many packets will last several seasons. Saving seed from open-pollinated varieties of beans, peas, tomatoes and herbs reduces costs further.

Compost

Compost keeps soil productive, so it is worth the money, but you can make much of it yourself from kitchen scraps and yard waste. Many towns also sell inexpensive municipal compost. Our beginner’s guide to composting explains how to start. The compost calculator works out how much you need each year.

Mulch and supplies

Shredded fall leaves and grass clippings make free mulch, and arborists often give away wood chips for paths. Stakes and trellises last for years if stored out of the weather.

Water

Water is a small cost for most gardens, but drip irrigation, soaker hoses, mulch and rainwater all reduce it further while making watering easier. The garden watering calculator estimates weekly needs, and the rainwater collection calculator shows how much your roof could supply.

The first year versus later years

Most of a new garden’s cost comes in the first year, when you build beds, buy soil and pick up tools. In later years, costs fall to seeds, plants, compost, supplies and water. That is why a garden that barely breaks even, or costs more than it produces, in year one can save money every year after. Enter your setup costs in the calculator to see the full first-year picture, then set them to zero to see what the garden costs to run from then on.

Value beyond the numbers

Money is only part of the story. A home garden gives you produce picked at peak ripeness, varieties you will never find in a store, and certainty about how your food was grown. Gardening is also widely associated with physical activity and time outdoors, and many people simply find it enjoyable and calming. Those benefits are hard to put a price on, but for many gardeners they matter more than the savings.

Tracking your garden’s real costs

Estimates are useful, but your own numbers are better. A simple system:

1. Keep receipts for seeds, plants, compost and supplies in one envelope or folder.
2. Weigh harvests and jot them down by crop.
3. At the end of the season, total both and enter them in the calculator.
4. Note which crops produced the most value per square foot, and plan next year around them.

After a season or two, you will know exactly what your garden costs and what it gives back.

Common mistakes when budgeting a garden

• Counting setup costs as yearly costs. Beds and tools are paid for once.
• Buying far more transplants than will fit. Check spacing with the plant spacing calculator before shopping.
• Overestimating yields. First-year gardens often produce less while the soil and the gardener improve.
• Growing low-value crops in limited space when saving money is the main goal.
• Ignoring free materials such as leaves, grass clippings and homemade compost.

Example budgets for three garden sizes

Using the calculator’s default prices, here is roughly what an established garden costs to run for a season at three common sizes.

• One 4-by-8-foot bed (32 sq ft): four seed packets, four transplants, an inch of compost, modest supplies and a little water come to roughly $80 for the season.
• A 100-square-foot garden: the default example, about $204 for the season.
• A 300-square-foot garden: around fifteen seed packets, thirty transplants, an inch of compost, more supplies and nearly 3,000 gallons of water come to roughly $500 if compost is bought in bags.

That last figure hides a big saving. An inch of compost over 300 square feet is about 25 cubic feet, close to a cubic yard. Bought in bags at $8 per cubic foot, it costs around $200. Bought in bulk, a cubic yard often costs a fraction of that, even with delivery. As gardens grow, buying compost and soil in bulk becomes one of the easiest ways to keep costs down.

A quick way to compare crops

You do not need precise yield data to make smarter choices. A rough comparison of cost in and value out for each crop is enough.

• A cherry tomato transplant costing a few dollars can produce many pounds of fruit over a summer, worth far more than the plant.
• A packet of lettuce seed can produce dozens of heads or months of cut-and-come-again leaves.
• A packet of bush beans can sow a long row that produces for several weeks, with a second sowing extending the harvest.
• A few herb plants can replace many small, expensive supermarket packets over a season.
• A row of potatoes or onions produces well, but because these crops are inexpensive in stores, the savings are modest.

Grow what you love to eat first. Then, if saving money matters, give the rest of the space to crops with the best ratio of value to cost.

Making a garden budget stretch

A few habits make the biggest difference to what a garden costs each year:

• Plan before you shop. Decide what fits in each bed before buying plants, so impulse purchases do not end up crowded or unplanted.
• Succession sow instead of overbuying. Small sowings every few weeks use seed efficiently and avoid gluts that go to waste.
• Share with neighbors. Split seed packets, bulk soil deliveries and tool purchases.
• Save seed from open-pollinated varieties you like.
• Preserve surpluses. Freezing, drying or sharing extra produce makes sure what you grow is actually used, which is where the real savings come from.

Frequently asked questions