Question from Heather: I live near the coast. When is the best time to prune back lavendar? I did it a few months back, but not aggressively. Now they are even larger, too big in fact.
Answer from Pat: Prune lavendar as soon as the main blossom season has finished. Lavendar needs full sun. Otherwise it will grow towards the light and become uneven. Prune it after bloom by shearing the plant all over removing all the blooms and at least an inch or two of foliage. Don’t cut it back into bare wood, however. Only shear away of some of the gray green foliage and all of the blossoms. Some lavenders bloom mostly in spring, others in summer, some year round and others twice a year. The year round one’s are best sheared following spring bloom and again lightly in fall. Strive for a nice smooth rounded shape. By shearing lavender this way after bloom you can keep it more compact and help it to live longer. If growing in very poor soil, fertilize lightly after shearing with a balanced organic fertilizer and follow up with irrigation.