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| Plant Expert: |
Michael Dirr
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| Forsythia x intermedia |
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Requires full sun.
Moderate climate.
Dirr says: "full sun to maximize flower"
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Climate / Hardiness Zones:
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Zone 5 to Zone 9
Dirr says: "vegetatively hardy in zone 4, however, flower buds are often killed in Zone 5, acceptable in 6 to 8(9); -10 to -15 degrees F appear to coincide with flower bud kill. Often injured by late freezes and flower quality is reduced; I have seen forsythia flowers a beautiful golden yellow one day and with a hard freeze over night they are transformed to brown mush"
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Growth:
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Range: Grows from 5' to 10'.
Dirr says: "Rank-growing, differentially developing upright and arching canes which give it the appearance that the roots were stuck in an electric socket; always needs grooming, one of the most overrated and over-used shrubs!; will sucker to form large colonies."
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Flowers:
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Color(s): Yellow
Season(s):
Spring
Dirr says: "bloom for 2 to 3 weeks on old wood; the justifiable reason for using forsythia is the wonderful flower effect in early spring; in the Midwest one was easily frustrated waiting for a swaggering golden yellow shrub to appear in the spring landscape only to find that a significant portion of the flower buds was killed by cold. Prune after flowering by cutting plant to ground or removing the oldest stems."
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Foliage:
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Deciduous
Color:
Leaves are dark green and green in the summer and yellow and green in the fall.
Dirr says: "green or yellow-green in fall, sometimes with a tinge of purple; have seen respectable fall color on certain plants in the Athens, GA area, leaves hold late (November) and may turn a deep burgundy"
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Fruit:
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Color:
Black
Season(s):
Fall
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Landscape Value:
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Can be used as a grouping plant.
Dirr says: "Chief value is in the early spring flower; forsythia do not belong in foundation plantings but are often used there; shrub border, massing, groupings, bank plantings are the most appropriateplaces"
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Other:
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Is Resistant to Disease
Is Resistant to Insects
Is Urban Tolerant
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Other Forsythia x intermedia References & Articles:
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Forsythia x intermedia is hardy in these areas:| Alameda, CA | Alamo, CA | Alsip, IL | | American Canyon, CA | Angwin, CA | Antioch, CA | | Baltimore, MD | Bayside, NY | Bronx, NY | | Brooklyn, NY | Brownsville, TX | Canton, MI | | Chicago, IL | Cicero, IL | College Point, NY | | Conneaut, OH | Corona, NY | Danville, CA | | Detroit, MI | Dorset, OH | East Claridon, OH | | East Elmhurst, NY | Ecorse, MI | Elmhurst, NY | | Elmwood Park, IL | Elyria, OH | Essex, CA | | Evergreen Park, IL | Fawnskin, CA | Ferndale, MI | | Florence, SC | Flushing, NY | Fontana, CA | | Forest Falls, CA | Forest Hills, NY | Fort Eustis, VA | | Fresh Meadows, NY | Glen Burnie, MD | Gwynn Oak, MD | | Harper Woods, MI | Harrison Township, MI | Hunt Valley, MD | | Jackson Heights, NY | Leasburg, NC | Lexington, NC | | Liberty, NC | Linwood, NC | Little Neck, NY | | Ludlow, CA | Macomb, MI | Marysville, MI | | Maspeth, NY | Memphis, MI | Mercedes, TX | | Middle Village, NY | Mission, TX | Modesto, CA | | Moreno Valley, CA | Morgantown, WV | Mount Clemens, MI | | New Baltimore, MI | New Haven, MI | New York, NY | | Newport News, VA | North Ridgeville, OH | North Street, MI | | Oakland Gardens, NY | Olmito, TX | Penitas, TX | | Pharr, TX | Phelan, CA | Philadelphia, PA | | Pikesville, MD | Pinon Hills, CA | Port Isabel, TX | | Progreso, TX | Redlands, CA | Rego Park, NY | | Rialto, CA | Ridgewood, NY | Rimforest, CA | | Riverdale, IL | Saratoga, CA | Soquel, CA | | Sparrows Point, MD | Staten Island, NY | Taylor, MI | | Temperance, MI | Temple City, CA | Towson, MD | | Trenton, MI | Tres Pinos, CA | Upland, CA | | Virginia Beach, VA | Walnut, CA | Watsonville, CA | | Wayne, MI | Westland, MI | Whitestone, NY | | Whitmore Lake, MI |
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