I am sowing some wild flower seeds in a spare lawn - not exactly a wild-flower
meadow - but a small similar.

Some of the seeds say to be sown in situ - some in seed trays.

I was hoping to sow all the seeds in greenhouse and then transplant.

Would that work - or do some really have to be sown in situ? Is that because
they will be too delicate to grow in pots and then transplant?