Collecting flower seeds
Some of my Cerinthe flowers have gone to seed and have formed seeds in the flower heads. Will this seed be ripe or do I just leave the flower heads on the plant. I want to collect some of the seed to give to a friend. If I cut off the flower heads now and put in a paper bag and leave to dry out will the seed ripen.
Could I do this with all the flower heads that I want to collect seed from. Or is it best to leave them on the plant till it's died back?