Robinia Pseudoacacia, also known as the Black Locust, is a fast-growing tree that spreads rapidly through root suckers. Entire groves of Robinia Pseudoacacia can sprout in a very short time, each tree connected to the next via its roots. In many places Robinia Pseudoacacia is considered almost a weed. For those interested in propagating trees that are genetically identical to a parent tree, propagating by seeds is not an option due to the tremendous genetic variables that can occur in seeds. In order to raise trees that are genetically identical to a parent tree, cuttings are the only viable method, although cuttings of the Robinia Pseudoacacia can be difficult to root.
Cut small new-growth branches with a leaf node near the cut. Branches should be at least 8 inches long, but can be longer.
Dip the cut end into rooting hormone. Allow the powder to stick to the cutting.
Plant the cutting in a mixture of 50% sand and 50% vermiculite. Water well. Keep cuttings at a temperature of 70 to 75 degrees F.
Mist the cuttings frequently with a spray bottle and keep the soil damp.
Be patient. Rooting can take 3 months or more.
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