California Gardening: A stunning silk tree, 1 by jkom51

jkom51 wrote:
This magnificent Albizzia julibrissin aka "Silk tree" was planted in a mere 1" deep bed behind one of the buildings that comprises the Kaiser Permanente HMO complex in Oakland. Many people report it as invasive, but either it is constrained by our dry-summer West, or this unknown species behaves better. As far as I can tell this bed is, or at least once was, irrigated, but in the twenty years we've watched it, there have been no seedlings sprouting up.