i have heard that a little extra heat on your clones roots can be vary helpful, heating pads? reptile heating rocks? whats something that can give a warm surface for rockwool clones

a seedling heating pad works well, people heating pads get hot.
I have not had any luck with reptile rocks, they don't spread the heat well
if in a bind put them, in a dome, on top of a crt monitor
I have also seen a small jiffy pelet tray in a large glass cake pan full of water and an fish tank heater
on top of the water heater is perfect most of the time too

I've noticed increased growth spurts when I water with warm water...
But I'm not sure if that helps you.

__________________