Do I need to fertilize if I'm using ProMix?
I finally got a grow light arrangement and started my first flats of seedlings this spring. I have a few cells that still need to germinate, but also some happy baby plants. I started things on March 18. Questions from a newbie...
The FAQ says you should start fertilizing with a dilute (25% strength) liquid fertilizer once a few true leaves form. Is that necessary with a seed starting media like ProMix, which contains compost?
Also, this is unrelated to fertilizer, but I see that I have a couple little gnats flying around my plants. I suspect they are a side product of what were too-damp conditions when I started the seeds. As soon as I realized I had a problem, I took the plastic domes off of my flats, even though I still had a few ungerminated cells. Instead I and am closely watching the moisture so nothing dries out. This has already helped-- there was a bit of algae beginning to grow on my shallot cells (which take a while to germinate) but now that the cover is off, not only have the shallots emerged but the algae is gone. But I'm wondering if I should be worried about those gnats? There aren't many. I've seen maybe 2-3 of them.