Propagation by Seed Harvest laburnum seeds in autumn. Gather the laburnum seeds and store them in the refrigerator until planting time in late summer the following year. At planting time, soak the seeds in warm water for 24 hours, and then plant the seeds directly in the soil. Cover the seeds with about 1/4 inch of soil and keep the soil slightly moist until the seeds germinate. After the laburnum seeds germinate, allow the soil to dry slightly between waterings in order to encourage the development of long, healthy roots.
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Oh man this is one of my favorite trees. and I have no room left in my yard. I live downtown Bremerton Wa. It is a navey Town. This was oir rental property. Our Home was on Bainbridge Island we had 3 1/2 acres. our home burned down we could not afford to rebuild, it was right when the economy was taking a dive. anyways I use to plant so many trees and plants. we'll when we moved into our rental I just could not stop I have 2 cherry trees, 1 plum tree, 2 apple trees thrn I have a cedar and seven more varietys. and rhat doesnt include the tree we had when we bought the place.seven more varietys. and I still have not bought my most favorite tree, Whixh is pink dog wood. I wish I had room for more trees. I'm a tree hugger. Infact one of my auctions I stated that because of some map;e earrings I'm trying to auction off . they are beautiful.