Root trimming the rootstock the second time was, I believe, the secret to success for me.
Another I picked up somewhere (probably from Bill) is to water the scions well soon before grafting, but let the root stock dry out a bit. I went one step further and put the cut scion immediately into a cup of water while finding the appropriate grafting clip, getting my pot of coarse DE in position to accept the graft, etc.
And while the pots with the coarse DE were "precharged" with water, it was allowed to drain through into a bowl and this was the last watering the the pots got until after the plants were moved out of the humidity dome and under the lights.
As for misting, I definitely over did it on the first batch that died. For the second batch I only spritzed the inside of the dome, never the plants themselves.
Cole, spend the winter experimenting--you'll be better prepared for the coming season!
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