Too many basil seedlings
I recently sowed some basil seeds which have now germinated. Since I sowed quite a few (partly through pessimism and partly the exuberant help of a toddler) I now have lots of seedlings all densely packed together in a few pots.
When should I separate these out, and should I be thinning them now already (they are a centimetre high) to make sure some survive? Or just leave them to do their thing?