Wish you luck with everything MC. If you've got a seedling heat mat, or can get any kind of heat in the root zone, you will see some explosive growth from those seedlings. In the past Ive used those heated wire types that you lay right into the medium, and bury. Ive had excellent results with these in large planters, several plants to a planter, sog stlye. Lately I just use those plug n play heat mats that lay under the pots. They work just as well, and wont reach temps that would harm the young plant roots. Keep us posted as you progress. Hope you're staying warm this winter. I dont know about you, but Im ready for the warm spring sun to shine thru.