On Jul 1, 11:07?pm, "Bob F" wrote:
My friend has a plant that is growing up to 10 feet high. She is
wondering if she could cut it back to maybe a foot high this next
winter, and expect it to survive and hopefully thrive and flower as a
somewhat smaller plant. Does anyone know if forsythia can handle this
kind of abuse?

With a forsythia that size it's best to split it into a couple three
smaller plants. With heavy pruning your forsythia will just come back
bigger and badder than ever.