✨ Lavender haircuts, hedge tune ups, and the last clean pass before July locks the shears away.
Portland lavender pruning in late June is one of those small jobs I look forward to all year — the bees are loud, the oil is fragrant, and a quick shape now sets the plant up for a tidy decade instead of a woody five years. With this week running dry and warm (mid 80s most days, a 92°F spike on Friday), I'm working hedges and lavender in the cool morning hours and saving everything else for shade. By the end of the week I want the structural pruning wrapped up, because once we cross into July I keep the shears off most shrubs entirely.
This Week's Action List
- 1
Shear lavender by about one third to one half once the flower spikes start fading — I cut into the soft green growth only, never into the gray woody base, because lavender refuses to push new shoots from bare old wood. Hidcote and Munstead respond best to this hard reshaping in late June.
- 2
Trim boxwood, privet, and holly hedges this week while growth has firmed up but before the Friday heat spike — I shear in the early morning, then run the hose over the foliage to rinse fine dust off and reduce stress. Avoid shearing on the 92°F Friday afternoon; freshly cut tips will scorch brown within hours.
- 3
This is your absolute last call for any spring bloomers you missed in April — lilac, weigela, mock orange, and forsythia. Once we hit late June, those shrubs start setting next spring's flower buds, and a July haircut means a flowerless 2027. If you haven't gotten to them by Sunday, leave them be.
- 4
Shape young Japanese maples lightly now to remove crossing branches and dead twigs, but skip any major structural cuts — the sap is still moving and big wounds in June bleed and invite borers. I keep cuts under pencil thickness and save the heavy work for January dormancy.
- 5
Clean and oil your shears between every shrub this week. With the dry warm forecast, fungal spread is low, but bacterial blight on boxwood and fireblight on any pome relatives (cotoneaster, hawthorn) still move on dirty blades. I wipe with isopropyl alcohol and finish with a drop of camellia oil on the pivot.
Frequently Asked Questions
Can I prune lavender hard in late June in Portland?
Yes, late June through early July is the ideal window in Zone 8b — right as the flowers fade but with enough warm weather left for the plant to push fresh growth before fall. Cut back by a third to a half into green stems only. If you cut into the gray woody base, that section will likely never regrow.
Is it too late to prune rhododendrons after they bloomed in May?
It is right at the edge. Rhododendrons set next year's flower buds in late June and early July, so any shaping needs to happen this week at the latest. After about June 25 in Portland, put the pruners down on rhodies, azaleas, and camellias until after they bloom next spring.