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Hardiness: USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) USDA Zone 7a: to -17.7 °C (0 °F) USDA Zone 7b: to -14.9 °C (5 °F) USDA Zone 8a: to -12.2 °C (10 °F) USDA Zone 8b: to -9.4 °C (15 °F) USDA Zone 9a: to -6.6 °C (20 °F) USDA Zone 9b: to -3.8 °C (25 °F)
Sun Exposure: Full Sun
Danger: Seed is poisonous if ingested Parts of plant are poisonous if ingested
Bloom Color: White/Near White
Bloom Time: Late Spring/Early Summer
Foliage: Grown for foliage Deciduous Smooth-Textured
Other details: This plant is attractive to bees, butterflies and/or birds Flowers are fragrant
Soil pH requirements: 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline)
On Mar 15, 2008, distantkin from Saint Cloud, MN (Zone 4b) wrote:
Black locust (Robinia pseudoacacia) is considered invasive by the Minnesota DNR
"Ecological Threat:
* Invades primarily disturbed habitats, degraded wood, thickets and old fields crowding out native vegetation of prairies, oak savannas and upland forests, forming single species stands.
* It reproduces vigorously by root suckering and stump sprouting forming a common connecting root system.
* It is native to the U.S. and occurs naturally on the lower Appalachian mountain slopes. It has been extensively planted for its nitrogen-fixing qualities and its hard wood."
On Oct 10, 2002, philomel from Castelnau RB Pyrenées France (Zone 8a) wrote:
A fast growing tree with spines. It sometimes produces suckers. In June racemes of white, scented flowers hang from the branches. However this cultivar is grown for its outstanding lime yellow leaves. They are among the latest to appear in the spring, but contrast wonderfully with the dark wood of the branches and give a magnificent display through to the autumn, when they take on warmer golden hues before falling.
Regional...
This plant has been said to grow in the following regions:
Ainažu Lauku Teritorija, , Alaska , California Anderson, California Lake Nacimiento, California San Leandro, California Sebastopol, California Denver, Colorado Aldora, Georgia Benton, Kentucky Salvisa, Kentucky Lafayette, Louisiana Valley Lee, Maryland Tyngsborough, Massachusetts Bellaire, Michigan Inver Grove Heights, Minnesota South Saint Paul, Minnesota St Cloud, Minnesota Panama, New York Gates Mills, Ohio Beaverton, Oregon Gresham, Oregon Mount Angel, Oregon Moosic, Pennsylvania Pittsburgh, Pennsylvania Lubbock, Texas San Antonio, Texas Alexandria, Virginia Chinook, Washington Port Angeles, Washington Tacoma, Washington Cambridge, Wisconsin Elmwood, Wisconsin
2 members have or want this plant for trade.
