Grafted Tomatoes: Worth the Extra Cost or Not?

When grafting clearly pays

Rootstocks are bred for resistance to soil diseases, nematodes, and stress, plus extra vigor. Alabama Cooperative Extension's grafted tomato trial found grafted plants outyielded non-grafted Red Snapper, with the best rootstock (Bowman) producing 13 pounds of marketable fruit per plant, about 3.75 pounds more per plant than non-grafted. Extension notes grafted plants are especially a viable solution for growers with limited space to rotate out of solanaceous crops. If you garden in the same bed year after year and battle wilts or root-knot nematode, grafting is the strongest tool short of moving the garden.

When it's probably not worth it

The economics change in clean soil. A University of Maryland Extension trial run without soil disease problems measured grafted plants at 15.2 pounds per plant against 13.7 pounds for non-grafted, an 11 percent increase, but the grower still calculated a loss of about 21 cents per grafted plant once the higher transplant cost was counted. The Alabama trial priced grafted transplants at $1.20 to $1.80 each, several times the cost of an ordinary plant. In good soil with rotation, that premium usually outweighs the modest yield gain.

✔ If you want to try grafting cheaply, grafting your own plants or buying cooperatively drops the added cost to roughly 30 to 50 cents per plant in rootstock seed, which a small yield bump can cover.

How to decide for your garden

• Fighting verticillium/fusarium wilt, nematodes, or can't rotate: grafted plants are likely worth the premium.
• Healthy soil with normal rotation: standard transplants usually give better value.
• Short season or high tunnel where every plant must maximize output: the vigor can help.
• Whatever you buy, keep the graft union above the soil line so the scion never roots and defeats the purpose.

Sources

Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.

• University of Maryland Extension - Does It Pay to Graft Tomatoes When There Are No Soil Disease Problems — In a trial without soil disease pressure, grafted tomatoes yielded 15.2 lbs/plant vs 13.7 lbs/plant non-grafted (11% increase), but the added transplant cost produced a loss of about $0.21 per grafted plant.
• Alabama Cooperative Extension - Grafted Tomato Trial: Data & Insights — Best grafted rootstock (Bowman) yielded 13 lbs marketable fruit per plant, 3.75 lbs more than non-grafted; grafted transplants cost $1.20-$1.80 each; grafting is a viable solution for growers with limited space to rotate out of solanaceous crops.
• Penn State Extension - To Graft or Not to Graft? — Grafting onto vigorous, disease-resistant rootstock can raise yield and manage soil-borne disease, with the benefit greatest under disease pressure or stress.

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