I'm having rather mixed results from seed starting in those little rock wool cubes. My seeds are all 2010 vintage and I've planted several different varieties of lettuce and tomatoes. The lettuce is at less than 50% and the tomatoes at 0% after 3 weeks.
I've started hundreds of seeds in seed starter for the garden in that window and on that table so it can't be the conditions. Should one fill the little holes in the rock wool blocks after the seeds are sown? With what?
Can you start hydroponics seeds in the smaller six packs in perlite or vermiculite and then gently wash the roots clean before transplantation into the net pots?
Thanks for any suggestions.