I read that delphinium needs cool temperatures and darkness to germinate, so I had my seeds in a cool, dark closet. Now three of the seeds have germinated. I know that the seedlings need light. So, do I put them under lights for the seedlings, or leave them in the dark a couple more days for the rest of the seeds?No, once they start to sprout, and you see the radicle - they've all had enough dark -- Put the tray under the lights so that they will not stretch.