Douglas and I have tentatively identified this as the cultivar ‘Lynwood’, though it could be another.
Ruth contributed the write-up for the rest of this entry. Ruth writes:
Thanks to their aggressive, sprawling nature, the forsythia you will most often encounter is this hybrid of Forsythia viridissima (an upright, green-stemmed species) and Forsythia suspensa (an arching, weeping species).
Each spring at my old, colonial home in New Hampshire, my father and I would go out almost every week to snip branches off our forsythia bushes to garnish our dining room table with. The fresh floral smell with the sprightly, yellow colour truly brought the long awaited spring season into the home.
These often spindly bushes are ridiculously easy to grow. Our neighbour pulled up one that became too big for his backyard. We dragged a chunk of it home, stuck it in a shallow hole and watered it. It had no problem adjusting to its new home.
A full sun location will get the best results, but forsythia are not picky. With too much shade they can become bare and woody. It is a good idea to cut them back each season to keep them dense, but please refrain from shaping them into balls or lollipops.
Forsythia bushes will grow to be a maximum of 6 feet and sprawl to be almost twice their height if not maintained. The flowers are four-lobed or 4-merous which is convenient for the memory. The four petals of the corolla are adnate at the base, fusing to form a tube. Often the buds can be sensitive to the harsh northern and prairie winters, although the branches will survive through temperatures exceeding -38 ºC. So if you live in an extreme environment, and your Forsythia doesn’t flower this year, just hang on and maybe next year it will snap out of it.