[header] How to root forsythia [title] Root forsythia after the bush has finished blooming and all of its flowers have fallen off. [substeps] Most garden experts recommend rooting forsythia indoors between december and february. The plant is dormant during this time, so the plant will be in the hardwood stage and cuttings will be less perishable. 
You can root forsythia year-round, but cuttings taken when the bush isn't dormant will be more fragile and require more care and attention. [title] Grow forsythia in well-drained, acidic soil and lots of shade.