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Old October 26, 2017   #17
zipcode
Tomatovillian™
 
Join Date: Jun 2010
Location: Romania/Germany , z 4-6
Posts: 1,117
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So you need a vigorous vegetative rootstock. Cheapest option would be to just buy some of those premium grape tomatoes and save some seeds. It will be f2 of some pretty vigurous stuff. Marmande is most certainly not a good idea. Something like Matt's wild cherry is also commonly used, since it's a vigorous plant, left unpruned it can grow into a hedge and have a stem inches thick.
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