Do you prune your forsythia annually; it blooms poorly on old wood. Remove 1/3 of the largest diameter central branches to the ground in spring after bloom time. Pruning after July 4th will drastically reduce next year's bloom. Forsythia also requires full sun for best bloom. The wild card is the weather. A warm spell in March followed by a return to freezing temps can ruin flower buds. Sporadic bloom after an early autumn cold snap is not uncommon.
Answered on November 14, 2017
Was this answer useful?00
Looking for more?
here are more questions about...Forsythia Bushes