In my experience the ones that pop out long after the others are less vital and very often there are some problems with them later. The strategy is to sow more if they take too long, but that only applies to seeds that I have plenty of. If I have something special and scarce, it's a different kettle of fish.
So, I'd like to ask an upside down question:
What is the longest safe margin? After how many days can I consider them beyond hope? 30 days or even more?
Milan HP
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