We are definitely seeing more grafting of vegetables all the time Can't grow watermelon but can grow pumpkins?. I think grafting tomato makes a lot of sense! These are the clips they sell https://www.amazon.com/Davids-Garden-Seeds-Grafting-D9032A/dp/B00EIQT7XI/ref=sr_1_1?ie=UTF8&qid=1481026151&sr=8-1&keywords=tomato+grafting
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