I`ve recently bought a flask of seedlings (SC (Cosmos x Beaufort) x SL
Jinn ).It is my first experience with flasks. The plants are ready to
deflask. I want to put some of them in s/h. Is it a good idea ? And how
should I harden them ? I am afraid, that if I put them into a plastic bag,
the roots may rot.

any advice is welcomed
greetings from Poland
Martha