Your planters look good, Jill.
Krebs 2- sometimes when a new plant adjusts to new growing conditions this can happen.
It may not be you, but some insult the plant suffered before you got it.
When a new plant arrives I always water in thoroughly and mist every other day for the first week or 2.
You will be able to tell when the plant is happy by its color and the way the leaves lie.
Lynn will know better than I.
Is there a photo of the seedlings you had the question about?
