Do you have another brand potting up mix that you could re-pot a few?
I believe that one brand last year could be completely different this year. Last season
I was convinced I had the 'bottom of the barrel' of a seed starting mix. It turned to
concrete after the first bottom watering...
This year an early started tray went south fast. Very few of those starts did well once
potted up. (I saved a few just to see and still look stunted)
So, I now have three seed starting mixes and three different potting up bags. I so don't
trust what worked before will do the same.
Fortunately I dense planted but repeated the same dense planting a couple weeks later
and the second tray is very healthy. Completely different seedling health. You would never
guess they are from the exact same seed packets.
The reason I mentioned too much moisture is a solid crate last year holding a dozen
seedlings got hit by a heavy rain while we were out of town for the weekend. Wet feet
caused droopy foliage but recovered once dry.
Aphids are sneaky fellas.
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