Not all garden crops deliver equal value. A square foot of lettuce produces five to ten times the grocery-replacement value of a square foot of potatoes. A $3 packet of bean seeds yields 50 pounds of food. Meanwhile, a $4 artichoke transplant produces maybe 6 artichokes over three years if you are lucky and live in the right climate. If your goal is to grow the most food for the least money — and for most of us starting out, it is — crop selection matters more than any other single decision.
This guide ranks common garden vegetables by their true cost efficiency: the ratio of grocery-replacement value produced to total growing cost including seeds, soil space, water, and time. The winners might surprise you, and understanding why they win will help you design a garden that maximizes every dollar and every square foot. Use our yield calculator to estimate production for your specific garden size.
How We Calculate Cost Per Serving
Every crop in this ranking is evaluated on four metrics. Seed cost per plant or per square foot of growing area. Yield in pounds per square foot over a full growing season including succession plantings where applicable. Grocery replacement value based on mid-range conventional supermarket prices in 2025-2026. And resource demands — some crops need significantly more water, fertilizer, or pest management than others, which adds hidden cost.
A serving of vegetables is approximately one-half cup cooked or one cup raw, which weighs roughly 3 to 5 ounces depending on the vegetable. When I refer to cost per serving, I mean the total garden cost to produce one serving divided into the grocery price of that same serving. An ROI above 1.0 means the garden version costs less than the store version. The higher the ROI, the better the deal.
All yields assume a reasonably managed garden in USDA zones 5 through 8 with adequate water and sunlight. First-year gardeners should expect yields at the lower end of each range. Experienced gardeners consistently hit the upper end.
Lettuce and Salad Greens: The Undisputed Champion
Lettuce is the single most cost-effective crop a home gardener can grow, and it is not close. A $3 packet of mesclun or mixed lettuce seeds contains 500 to 1,000 seeds — enough to plant a 4x8 bed five to eight times. Each square foot of leaf lettuce produces 0.5 to 1 pound of salad greens per planting cycle, with a cycle lasting 30 to 45 days from seed to harvest for cut-and-come-again varieties.
In a 150-day growing season with succession planting every two to three weeks, a single square foot of lettuce can produce 3 to 6 pounds of salad greens. At grocery prices of $5 to $8 per pound for organic spring mix (or $3 to $5 for conventional), that one square foot generates $15 to $48 in value. The seed cost for that square foot is approximately $0.02. The ROI is astronomical — somewhere between 750:1 and 2,400:1.
The key to maximizing lettuce economics is succession planting. A single planting produces one harvest wave. But if you plant a new row every two weeks from early spring through fall, you create a continuous supply that replaces weekly grocery store purchases for six months or longer. This is where the savings become life-changing for families who eat a lot of salads — $20 to $40 per week in salad greens replaced by a garden investment of pennies per week in seeds.
Other salad greens — arugula, spinach, mizuna, tatsoi, and mustard greens — follow similar economics. Spinach is slightly less productive per square foot but commands higher grocery prices. Arugula is faster to mature and more heat-tolerant than lettuce for extended harvests.
Tomatoes: The Volume King
If lettuce wins on ROI per square foot, tomatoes win on total value per plant. A single indeterminate tomato plant — the vining type that keeps producing until frost — yields 10 to 25 pounds of fruit over a growing season. A plant started from a $3 to $5 transplant (or $0.03 from seed) occupying 4 square feet of bed space produces $25 to $100 in grocery-replacement value depending on variety and local prices.
The economics favor indeterminate varieties over determinate types for most home gardeners. Determinate tomatoes produce their entire crop in a 2 to 3 week window, which is useful for canning but less valuable for fresh eating. Indeterminate plants produce steadily from midsummer through frost, replacing weekly tomato purchases for three to four months.
Cherry and grape tomatoes deliver the highest value per plant because they command premium grocery prices ($4 to $6 per pint) and produce prolifically — a single Sun Gold or Sweet 100 plant can yield 200 to 500 individual fruits. Heirloom slicing tomatoes like Brandywine or Cherokee Purple deliver high value because their grocery equivalent — if you can even find them — runs $4 to $7 per pound.
Growing tomatoes from seed instead of transplants drops the per-plant cost from $3 to $5 down to roughly $0.03, but requires 6 to 8 weeks of indoor starting time and a basic setup with grow lights or a sunny window. The economics of seed starting are overwhelmingly positive for any gardener growing more than 4 or 5 tomato plants.
Herbs: Small Footprint, Enormous Value
Fresh herbs occupy a unique position in garden economics because the grocery markup on fresh herbs is extraordinary. A typical grocery store package of fresh basil contains 0.5 to 1 ounce and costs $2.50 to $4.00. That is $40 to $128 per pound. A single basil plant in a garden produces 0.5 to 2 pounds of leaves over a season, representing $20 to $256 in grocery value from a plant that cost $0.02 in seed or $3 to $4 as a transplant.
The top herbs for cost savings are basil (highest volume producer), cilantro (succession planted every 3 weeks for continuous supply), parsley (biennial that produces for two seasons from one planting), mint (aggressively productive — grow in containers to prevent takeover), chives (perennial that returns year after year with zero ongoing cost), and rosemary (perennial in zones 7 and above, produces for years from a single plant).
Herbs also have the advantage of minimal space requirements. A 2x2-foot herb section in a raised bed produces enough basil, cilantro, and parsley to completely replace fresh herb purchases for a household that cooks regularly. That 4 square feet generates $100 to $300 in annual value — far more per square foot than any vegetable.
Green Beans: The Reliable Workhorse
Green beans are the most foolproof high-value crop for beginning gardeners. They germinate reliably, tolerate imperfect soil, resist most pests, and produce heavily with minimal care. A $3 packet of bush bean seeds plants 15 to 20 feet of row. Each foot of row produces 0.5 to 1 pound of beans. Total yield from one packet: 7 to 20 pounds of green beans.
At grocery prices of $2.50 to $3.50 per pound for fresh green beans, that $3 seed packet produces $17 to $70 in value. The ROI ranges from 6:1 to 23:1, which is excellent for a crop that requires almost no specialized knowledge or intensive care.
Pole beans are even more productive per square foot because they grow vertically, producing 1 to 1.5 pounds per square foot of bed space compared to 0.5 to 0.75 pounds for bush types. The tradeoff is that pole beans need a trellis, which adds $10 to $30 in materials for a simple structure. That trellis lasts multiple seasons, so the cost amortizes quickly.
Succession planting bush beans every 2 to 3 weeks extends the harvest from a concentrated 2-week window to a continuous supply over 8 to 12 weeks. Three successive plantings from a single seed packet provide green beans from midsummer through early fall.
Zucchini and Summer Squash: The Abundance Crop
Zucchini is legendarily productive. One or two plants provide more summer squash than most families can eat, which is simultaneously the crop's greatest strength and its limitation. A single zucchini plant produces 5 to 15 pounds of fruit over a season — sometimes much more. Two plants can yield 10 to 30 pounds. At $1.50 to $2.50 per pound, that is $15 to $75 in value from $0.10 worth of seeds.
The cost efficiency is excellent on paper, but the practical value depends on how much squash your family actually eats. If you normally buy 2 pounds of zucchini per week for 12 weeks (24 pounds total), your garden replaces $36 to $60 in purchases. If you would not have bought that much squash, the surplus has value only if you preserve it, share it, or use it in recipes you would not otherwise make — zucchini bread, grilled squash, spiralized squash noodles.
The smart approach is to plant one or two zucchini plants rather than the four or five that seed packet enthusiasm might suggest, and devote the remaining space to crops with more consistent consumption patterns. Zucchini occupies significant real estate — each plant needs 9 to 16 square feet — so the value per square foot is moderate despite the high total yield per plant.
Cucumbers: High Yield, Steady Demand
Cucumbers offer a better balance of productivity and household consumption than zucchini. A single cucumber plant produces 5 to 10 pounds of fruit — enough for regular salad use without overwhelming your kitchen. At $1.50 to $2.50 per pound for slicing cucumbers (or $3.00 to $5.00 per pound for the small pickling or Persian varieties sold at premium grocery stores), each plant produces $7 to $50 in value.
Growing cucumbers vertically on a trellis is the cost-efficient approach. Trellised cucumbers produce straighter fruit, suffer less disease from ground contact, and yield more per square foot — up to 2 pounds per square foot of bed area compared to 0.5 to 1 pound for sprawling plants. A simple string trellis costs essentially nothing and dramatically improves the economics.
Pickling cucumbers are a special case. If your family consumes pickles — and most American families go through 2 to 4 quarts per year — home-pickled cucumbers replace a premium grocery product. A quart of quality pickles costs $5 to $8 at the store. Four quarts of home-pickled cucumbers require roughly 8 pounds of pickling cucumbers, $3 in vinegar and spices, and $5 in jars (reusable). Total cost: approximately $8 for what would cost $20 to $32 at the store.
Kale: The Four-Season Producer
Kale earns a spot on this list not because of exceptional per-harvest yields but because of its extraordinary growing season. Kale survives frost, tolerates heat better than lettuce, and in mild climates (zones 7 and above) can produce harvestable leaves for 8 to 12 months from a single planting. A fall-planted kale crop in zone 7 survives winter and resumes heavy production in early spring, providing fresh greens during the most expensive season at the grocery store.
A single kale plant produces 2 to 5 pounds of leaves over its productive life. At grocery prices of $3 to $5 per bunch (roughly $4 to $8 per pound for organic), each plant yields $8 to $40 in value. Kale takes up about 2 square feet per plant, producing $4 to $20 per square foot — competitive with lettuce when you factor in the extended season.
The cost advantage of kale over lettuce is labor efficiency. You plant kale once and harvest for months. Lettuce requires repeated succession plantings. For time-strapped gardeners, kale's plant-once-harvest-many-times approach delivers strong economic returns with minimal ongoing effort.
The ROI Ranking: Value Per Square Foot
Combining all the data, here is the ranking of common garden vegetables by grocery-replacement value per square foot per season. These assume intermediate gardener skill and succession planting where applicable.
Fresh herbs: $25 to $75 per square foot. Lettuce and salad greens: $15 to $48 per square foot. Cherry tomatoes: $10 to $30 per square foot. Slicing tomatoes: $6 to $25 per square foot. Kale and chard: $4 to $20 per square foot. Green beans (pole): $3 to $12 per square foot. Peppers: $3 to $10 per square foot. Cucumbers (trellised): $3 to $10 per square foot. Zucchini: $2 to $8 per square foot. Bush beans: $1.50 to $6 per square foot. Root vegetables (carrots, beets): $1 to $4 per square foot. Potatoes: $0.75 to $2 per square foot.
The pattern is clear: leafy crops and herbs dominate the top of the ranking. Root vegetables and starchy crops occupy the bottom. This does not mean you should never grow potatoes — they have value in food security, storage potential, and eating satisfaction. But if your primary goal is maximizing savings per square foot, prioritize the top of this list. Use our spacing calculator to plan how many plants fit in your available space.
Seed Cost Versus Transplant Cost: When Each Makes Sense
A packet of tomato seeds costs $3 to $5 and contains 25 to 50 seeds. A single tomato transplant costs $3 to $6. If you are growing 6 tomato plants, seeds save you $15 to $30 over transplants — but you need to invest 6 to 8 weeks of indoor growing time and a basic seed starting setup ($20 to $50 for trays, lights, and mix).
The break-even point for seed starting versus buying transplants depends on volume. For crops where you plant 1 to 3 plants — like tomatoes, peppers, or eggplant — transplants are often the better value when you account for the time and materials of indoor starting. For crops where you plant dozens of plants — lettuce, beans, herbs, greens — seeds are dramatically cheaper and direct sowing is often the preferred method anyway.
The most cost-effective approach for most home gardeners is a hybrid: buy transplants for the 3 to 6 tomato and pepper plants you need, and direct-sow everything else from seed. This minimizes both cost and complexity while keeping the variety selection wide.
Frequently Asked Questions
What is the cheapest vegetable to grow from seed?
Lettuce is the cheapest vegetable to grow per serving. A $3 seed packet produces enough salad greens to replace $150 to $500 in grocery purchases over a season through succession planting. Green beans are the second cheapest, with a $3 packet yielding 7 to 20 pounds of produce worth $17 to $70 at the store.
Are potatoes worth growing in a raised bed?
Potatoes are among the least cost-effective crops for raised beds because grocery potatoes are cheap ($0.75 to $1.50 per pound) and the yield per square foot is modest. However, specialty potatoes — fingerlings, purple varieties, and fresh new potatoes — command $3 to $5 per pound at the store and are genuinely worth growing. If you love potatoes and have the space, grow specialty varieties for the best return.
How much can I save by growing my own herbs?
A 2x2-foot herb garden producing basil, cilantro, parsley, and chives replaces $100 to $300 in annual grocery herb purchases for a household that cooks regularly. Fresh herbs have the highest grocery markup of any produce category, making them the single best investment per square foot in any garden.
Should I grow expensive vegetables or high-yielding vegetables?
Both strategies work, but for different reasons. High-yielding crops like tomatoes and beans produce the most total food per plant. Expensive crops like herbs and salad greens produce the most value per square foot. The ideal garden combines both — a few tomato plants for volume and a dedicated section for herbs and greens for maximum value density. Avoid crops that are both low-yielding and cheap at the store, like celery or standard potatoes.
Does succession planting really make that big a difference?
Succession planting is the single most effective strategy for maximizing garden value. A single planting of lettuce produces one harvest worth $5 to $8. The same square footage succession planted every two weeks produces five to six harvests worth $25 to $48 from the same space. For beans, three successive plantings turn a 2-week harvest into a 10-week continuous supply. The additional cost is essentially zero — you are using the same soil and seeds you already purchased.