Crapes root easily a few ways. Semi-hardwood shoots taken in summer root easily in sand or perlite, sealed in a clear bag in shade. Last year's growth planted in sand or sandy loam ground in April with tips flush with the surface will root and grow. Crapes will also root sucker if the root system is damaged. They'll grow from seed, but flowers may vary. I have over 25 varieties and all are easy to propagate.