Softwood, semi-hardwood, hardwood, or root cuttings can propagate crape myrtle. Softwood and semi-hardwood cuttings root easily when taken in spring or summer. Hardwood cuttings from dormant plants also root easily, although use of rooting hormone improves rooting percentages. Root cuttings may be dug in early spring and planted in the greenhouse. Plantings established with root cuttings are normally poor because of root inconsistently.
Seed capsules ripening in the fall may be collected, dried, and stored in sealed containers. No seed pre-treatment is necessary and seeds will germinate within 3 weeks after sowing. Best growth results when seeds are sown during the early days of spring. Seed should be sowed in well-drained slightly acidic to neutral moist soil and covered to a depth of one quarter on an inch.
When using container or root ball planting, choose sunny sites with well-drained soil, making sure there is enough room for shrub to reach its mature spread. Dig a hole twice as wide as container or root ball. Set plant at same depth or slightly higher than it was in the pot, or if balled, even with top of root ball. Fill in hole around plant with soil, mound soil to form a 2-inch-high ridge around perimeter of the hole to act as a catch basin. If plant is balled in synthetic fabric, remove fabric carefully before planting. Burlap may be left around root ball and then peeled back once plant is set in hole. Water thoroughly, filling the basin and allowing water to settle several times. Spread 2-inch layer of mulch around plant
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