Forsythia a deciduous shrub which blooms February to April and has beautiful green foliage for the rest of the season. They can grow 8 to 12 feet high. You should prune established plants, cut down to the ground third of the branches that have bloomed, and get rid of old-growth. This keeps vigorous blooms each season.
The most popular species is Forsythia intermedia ‘Spectabilis‘ which has this beautiful yellow display of blooms. The semi-pendulous Forsythia suspensa makes a great shrub for planting against the north wall. For smaller gardens, there is Forsythia ovata which grows up to 5 ft.
How to grow Forsythia:
Forsythia is part of the Oleaceae family of plants. That is the Olive Family. The species are native to Eastern Asia, but there is one species native to Europe. Forsythia is named after William Forsyth (1737-1804). He was a Scottish Botanist and member of the Royal Horticultural Society.
I remember Forsythia since I was a child, it was a symbol of spring. Not only we had them in the garden but we would also buy them as cut flowers to decorate the house. The bright yellow flowers were a welcome brightness, especially after a dark and cold winter. Sometimes the cut branches would start a root system in the vase and we would then plant it in the garden.
The bright yellow blossoms of Forsythia are an excellent way to add colors to the garden especially in spring where before the leaves appear you have a splash of color. Forsythia is not hard to take care of and rewards you with beautiful flowers in spring and a beautiful green bush for the rest of the year.
Grow Forsythia in the sun or partial shade. Full sun will probably give you more flowers. Plant it in moist, fertile, but well-drained soil. But water them regularly. Forsythia is fast-growing. Propagate by semi-hardwood cuttings. Prune them each year. Thin out crowded shoots and cut back flowering shoots to a strong bud.