I have some perennial seeds that I am starting: blanket flower(Galliardia), purple coneflower, lavender, and echinops. They have been growing for about a month now. Most of them have 2 sets of true leaves. In the last week or so some of the blanket flower, and echinops cotelydons have been yellowing. Isn't this a bit early for them to be falling off? Then on 2 of my blanket flower plants, I noticed some blotchy yellowing. One leaf has a tiny pinprick of brown in the middle of this yellowing.

I think I was overwatering them, so I've cut back. What else am I doing wrong? Should I pull the plants with the blotchy yellow leaves out (is it something that will spread?) I heard that overwatering can effect that plants ability to take up nitrogen, so it might be sucking the nitrogen out of the cotelydons. I'm not sure what to do...they looked really healthy for the first 3 weeks - though they seem to be growing slowly! One more thing...I water has quite a high calcium content. There is some calcium crust on top of the soil. I was watering from the bottom, but I have since begun watering from the top because I was having trouble not watering them too much from the bottom.