Trees, Shrubs and Conifers: Tree Lilac thriving but NO Flowers!, 0 by Clare_CA

Clare_CA wrote:
I agree that shocking the roots is a bad idea for lilacs and wisterias. Guy is absolutely right that, if you do this, flowering can be induced at great expense to the tree, possibly even death. It can also do the opposite: shock the tree so much that it doesn't bloom for years. This was indeed bad advice. Peter Valder's book on wisterias says that the number one reason why wisterias won't bloom is lack of full sun. Lilacs also need full sun to for the best bloom. With proper lighting and nutrition, you lilacs and wisterias will bloom in time. I'm in Zone 10, and I shouldn't be able to get lilacs and wisterias to bloom, but I do.