Regional data:
Southeastern Pennsylvania: (cultivated) January, February, March, April New Hampshire: April, May Central Pennsylvania: AprilMay Prague, Czech Republic: (cultivated) March, April South Bohemia, Czech Republic: March Moravia-Silesia, Czech Republic: (cultivated) April, May Aurora, Colorado area: April
Additional images:
Flowers on branch
Flowers and stem
Flower detail
Please contribute!This page is a profile for the plant species Forsythia x intermedia, used to collect records of where and when this plant was observed blooming, and for providing identification information for use in dichotomous keys. If you would like to help collect data for this or other plants, see Bloom clock project/How to Contribute for orientation.