Here's what Clothier says about abutilon. Are you using bottom heat?
Abutilon darwinii , , ,Type= a/p , , sow @ 75ºF , 15-30d
Abutilon theophrasti , velvetleaf, flower of an hour , ,Type= an , , sow @ 75ºF , 15-30d , cornfield weed
Abutilon vitifolium , parlour maple , ,Type= an , , sow @ 75ºF , 15-30d
Karen