Hi thanks for the response. Rootstocks for tomatoes are in 98 cell plug trays and they have roots. Plants are lightly watered 8 hours before at a level of 2/5 where 1/5 would be very light & 5/5 would be leaching. If you are having this problem with grafts being pushed off, then you should consider using a smaller pot size and drying them down more before grafting.
Plants are grafted at 1.5-2 mm stem diameter I never have problems with scions being pushed off using these techniques, but watermelons are a different story and cuttings are more useful there. I get 95% germination and 80-95% graft take, averaging about 70% marketability from seed. Plants are typically sold in 3.5" or #1 containers.
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