How much space in the garden should I allow for a grafted tomato plant?
Multnomah County Oregon
Hello and thank you for asking about growing grafted tomatoes. I do not have research available to answer your question. The type of plants grafted determine the growth habit. Many of the root stocks are vigorous and large compared to commonly grown plants. Perhaps you can research the root and top-graft types you have purchased. Other gardeners and local nurseries selling these plants may also have good advice to share.
Sorry I can't be more specific. Best wishes with your garden.