Border Forsythia - 'Forsythia x intermedia'An extremely popular flowering shrub, it is most known for its vigorous, heavy-blooming that becomes a spectacle during late winter to early spring. Blooms of bright yellow flowers which are abundant and well-distributed along the branches cover the shrub before the new spring foliage emerges. After flowering, Border Forsythia simply blends back into the landscape for the remainder of the growing season as an upright-spreading, somewhat boring, green-leaved, deciduous shrub. It will typically grow between 6 and 9 feet in height and as wide. Its leaves turn yellow with purple tinges in fall.
||Arnold Giant, Beatrix Farrand, Densiflora, Goldzauber, Karl Sax, Lynwood Gold, Minigold, Nana, Parkdekur, Primulina, Spectabilis, Spring Glory, Tremonia, Variegata, Vitellina|
||Deciduous Flowering Shrub|
||Leaves are opposite, simple, toothed usually on the upper one-half, ovate-oblong to oblong lanceolate, 3 to 5 inches long, medium to dark green above, lighter below, and glabrous. Leaves turn to green or yellow green in fall, sometimes with a tinge of purple.|
||8 to 10 feet high by 10 to 12 feet wide.|
||Zone 6 to 8. For an idea of your plant zone please visit the USDA Plant Hardiness Zone Map.|
||Upright, rank growing deciduous shrub, differentially developing upright and arching canes which give it the appearance the roots were stuck in an electric socket; always needs grooming, one of the most overrated and over-used of all flowering shrubs.|
||Perfect, 1 to 2 inches long, pale to deep yellow depending on variety, 4-lobed corollas. The justifiable reason for using forsythia is the wonderful flower effect in early spring.|
|Diseases & Insects:
||Crown gall, leaf spots, dieback, four-lined plant bug, Japanese weevil, northern root-knot nematode and spider mites; none of these are extremely troublesome.|
||Chief value is in the early spring flower; forsythia does not belong in foundation plantings. Shrub border, massing, groupings, bank plantings are the most appropriate places.|
||Fibrous, transplants readily bare root or balled and burlapped and prefers a good, loose soil but will do well in about any soil. It is pH adaptable.|
||Water regularly after initial planting. Prune after flowering either by cutting plant to ground or removing the oldest stems.|
||Fertilize an area three times the canopy spread of the shrub 1 to 2 times a year with a 10-10-10 fertilizer. Only fertilize an established shrub.
||Dig a hole three times the diameter of the root system, with a depth no deeper than the original soil line on trunk. Break up the soil to the finest consistency possible. Place plant in hole and fill, compacting the fill dirt. Water the plant heavily to seal soil around the roots and remove air pockets. Water well, and remember to water regularly until they have started to grow.