How soon after my pepper seeds germinate can I fertilize them?

you will need to wait until they are totally established plants.

Hi Patricia, Here's a link that may be helpful! http://thepepperseed.com/growing-peppers/growing-peppers-from-seed/

Good luck!

If they are black peppers, they will germinate in a greenhouse (they are prone to die in cold weather) in about two weeks. If it's the red one, the seedlings will be seen in one 1/2 week, when there are the first cotyledons (the first temporary leaves)

There is a concrete cleaner solution ou can buy,as long as the concrete is as clean as you can get it you should be ok,buy concrete stain and roll it on with a paint roller with a long handle and then let it dry throughly,then apply sealant.

After the second set of leaves form.