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North Carolina’s Tom Elmore:
Grafting increases greenhouse tomato production by 30 percent annually
“I attended a North Carolina Greenhouse Growers Association meeting, and one of the speakers talked about grafting tomatoes. It didn’t seem that difficult, so I made the decision to plant half my greenhouse without grafts and the other house with grafted plants,” Elmore says.
In one bed containing both types, the grafted tomatoes did really well, and dwarfed the conventional plants, the North Carolina grower adds.
The next year he grafted all his greenhouse tomatoes, produced a big crop, and has spent the past few years perfecting the art and the science of grafting plants.
Basically, it’s simple, he says. You find a rootstock that resists soil diseases and then find a scion, or top part of the plant, that has the marketing qualities you want in a tomato and splice them together.
In reality, it’s significantly more detailed, though the North Carolina grower says it takes only a few hours to actually graft the plants he needs for his greenhouse.
The first step, he says, is to get the rootstock plants and scion plants seeded so they are similar in size at transplant time. The two plants are then cut at about 45 degree angles, and the scion is attached with a clamp to the rootstock.
“After the surgery, it takes the plant 7-10 days to recover. Then, it can be planted just like any other plant. The recovery requires high humidity to replace water lost in the procedure and low light to prevent the plant from losing moisture in the photosynthesis process,” Elmore explains.
Realistically, there is some crossover between the scion and rootstock, because the scion gets increased vigor from the rootstock, but basically above the graft you get characteristics of the scion and below the graft you get the characteristics of the rootstock, he adds
Click here to read the interview with Elmore at southeastfarmpress.com
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