Prune after flowering has completed in late spring. Remove oldest wood to the ground. Every few years the entire shrub can be cut back to about a foot tall to renew and control size.
How long does Forsythia take to grow?
These estimates for how long Forsythia takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.
Days to Germination How long does it take Forsythia to germinate?
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Days to Transplant How long until I can plant out Forsythia?
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Days to Maturity How long until Forsythia is ready for harvest / bloom?
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Total Growing Days How long does it take to grow Forsythia?