does it need to be pruned? If so when and how?
Washington County Oregon horticulture
Sub-shrubs are perennial plants whose woody growth originates at the base of the plant. Herbaceous growth occurs from basal buds, or buds at the base of the plant, during the growing season. Many garden herbs fall into this category.
The sub-shrubs described below bloom on new growth. It is important to remove old and dead growth to stimulate new stem formation and flowering. Unpruned sub-shrubs tend to become leggy and unattractive.
Spanish lavender (Lavandula stoechas) Severely pruning any old woody lavender is often tricky for its survival. Pruning is usually done after flower harvest or early spring. Try cutting back the most damaged area and see how it responds. Most agree that cutting it back to the ground is usually fatal. Sometimes on an old woody herb, the best course is to start a new planting.
Lavender (Lavendula angustifolia)
- Blooms on new growth
- Prune every year following establishment
- Prune when new leaves are first seen in the spring
- Remove about 1/3 of the (woody?) top growth
- When harvesting lavender flowers, shape to promote mounded form