FREE online courses on Vegetable Gardening - Pruning - Renewal Pruning
When shrubs are left to their own devices, the oldest
branches and stems will actually turn woody, and that's not good because woody
branches do not produce as many leaves and they start to look like trees.
You can put your fastest-growing shrubs on a 3-year renewal cycle so that the stems
and branches are never more than 3 years old!
- During the first year, remove
one-third of the shrub's branches and stems, cutting them right back to the
base and focusing on the thickest, woodiest and oldest ones.
- During the second year, remove
another third of the growth, again focusing on the oldest branches and leaving
the new growth alone.
- During the third year, remove
another third, cutting out the last of the old growth left after the first year
of pruning and again leaving the new growth alone.
- During subsequent years,
remove the old growth as needed but basically taking out the oldest third of
the growth and leaving the youngest, most productive branches.
With slow-growing shrubs, the 3-year cycle would probably
mean death, but a 5-year renewal cycle
(taking out the oldest fifth of a shrub's growth every year) should work for
most of them.