Hiya mel.
Back to one of my fav plants, astrantias
They are late in "emerging" anyway. At least that's my experience.
They have probably dried out....well, they have done.
Take them out of,the greenhouse and water well......let drain and water again.
I would keep them in their pots until you can see new growth. Give it another week or so before planting out into the garden.
Astrantias hate drying out....they will wither away in hot sun in well drained soil so part shade and keep moist. Then they are superb....I think