If you lightly wound the trunk or large branches near the base, by scraping.
Apr 21, When you’re pruning lavender plants that are established, aim to remove at least one-third of all growth. With older plants, you can cut back to Author: Julie Martens Forney. A Guide to How to Prune Lavender Bushes When to Cutback and Trim Lavender Plants. Here is a quick outline of what you need to know when you are pruning lavender plants. While lavender is a solid, strong plant in the right growing conditions, it does need special attention when it comes to pruning its branches, and pruning properly is the key.
Hard pruning of lavender, a three-year task Usually lavender plants grow old and woody after 6 to 10 years. Flowers, though still fragrant, grow sparse.
Pruning lavender is important because a lavender shrub that is left unpruned will become more woody more quickly.
And the nice round shape of its youth starts collapsing all over the place! Jun 15, Pruning woody lavender plants is the key to rejuvenating them. For restorative pruning, be sure to sterilize the pruners by soaking them in a solution of water and denatured alcohol to prevent disease spread.
It’s also important that the tool blades are sharp. Prune these lavender in spring when all frost is finished for the season.

Jan 13, Summer is the main time to prune lavender plants after the flower harvest. Cut back up to one-third of the leafy section of the stems, shaping the lavender into an evenly rounded mound as you prune.
To create the mounding shape, cut the outer stems a little shorter than the middle stems. Avoid cutting into the woody stem bases.