If there's one pruning mistake that turns up year after year in Nanaimo gardens, it's this: someone gets motivated in early spring, tidies everything up while the yard still looks dormant and manageable, and then wonders in June why their rhododendron never flowered. Or their lilac. Or their mock orange.
The answer, almost always, is that they pruned at the wrong time.
Spring is absolutely the season to get after hedges and shrubs — but not all of them, and not all at once. Here on Vancouver Island, we're lucky enough to have a long growing season that suits a wide range of flowering plants. The tradeoff is that the timing rules for pruning them are a bit more nuanced than in harsher climates where everything goes dormant and stays that way.
The Rule That Explains Most of It
Shrubs that flower on old wood — branches that grew last season — set their flower buds in late summer or fall. If you prune those branches in early spring, you remove the buds along with the wood. The plant doesn't die; it'll grow fine and look tidy. It just won't flower that year, and sometimes not for the year after, depending on how hard you cut.
Shrubs that flower on new wood — growth that appears in the current season — produce their flower buds on this year's branches. Pruning these in early spring is actually perfect timing: you're shaping the plant right before it pushes out the growth that will carry the flowers.
That's the core of it. Two categories: old-wood bloomers (prune after they flower) and new-wood bloomers (prune in early spring). The list below covers the plants you're most likely to find in Nanaimo, Lantzville, and Parksville gardens.
What NOT to Prune Right Now
If any of these are in your yard, put the shears away and wait until after they finish blooming. Depending on the species, that window is typically sometime between late April and early July:
- Rhododendron and azalea — by far the most common flowering shrub on Vancouver Island, and the most common pruning casualty. They flower on old wood. Wait until the blooms have dropped, then prune immediately after — the plant sets next year's buds quickly after flowering ends.
- Lilac (Syringa) — prune right after flowering for best results. Prune now and you lose this year's display entirely. The blooms are one of the nicest things about a Nanaimo spring; it's worth waiting.
- Forsythia — those early yellow flowers are already either open or just finishing by late April. If you haven't pruned it yet, wait until those blooms fade. Forsythia is fast-growing and tolerates hard pruning well — just do it at the right time.
- Mock orange (Philadelphus) — one of the best-smelling shrubs in any garden. The white flowers come in late May or June. Prune immediately after flowering.
- Flowering currant (Ribes sanguineum) — blooms early, often red-pink, and is a native of coastal BC. Prune right after it finishes flowering.
- Weigela — a common flowering shrub in our area, with tubular pink or red flowers in late spring. Prune in late June after flowering completes.
- Magnolia — flowers before the leaves emerge in some varieties, right after in others. Either way, wait until it's done before pruning.
If you're unsure about a shrub, look for swelling buds. If the buds look like they're about to open into flowers — not just leaves — put the shears away and come back in four to six weeks. When in doubt, wait: a shrub that misses one pruning looks a little overgrown. A shrub that misses a year of blooms is a visible disappointment all season.
What You Can — and Should — Prune Right Now
These plants either bloom on new wood or don't flower in a way where timing matters. April is an excellent time to shape all of them, before the spring growth flush really takes off:
- Laurel (Cherry laurel and English laurel) — the dominant hedge plant throughout Nanaimo, Lantzville, and the Parksville area. Prune as hard as needed; it recovers vigorously and the new growth through spring and summer is lush. This is the plant most often in need of significant reduction, and now is the right time.
- Cedar (Thuja) — another staple hedge, particularly along rural properties and acreages. Trim in spring before the new flush of growth appears. Don't cut back into old brown wood — cedar won't regenerate from bare wood the way laurel does.
- Boxwood — formal hedges and topiary shapes. Early spring pruning encourages fresh new growth and keeps the shape tight through the season.
- Privet — fast-growing and tolerant. Prune now and again in midsummer if needed.
- Photinia (Red Robin) — the bright red new growth is part of its appeal; trimming now encourages more of those decorative red shoots through spring.
- Ornamental grasses — cut them back hard now, before the new growth emerges from the centre. The old material provides insulation through winter; once you're clearly into spring, remove it.
- Summer-blooming shrubs (buddleia, hardy hibiscus, caryopteris, hydrangea paniculata) — these bloom on new wood. Hard pruning in early spring is exactly right for all of them, and will result in better flowering later in the season.
A Note on Technique
When you're pruning, angle your cuts away from buds and cut just above an outward-facing bud so the new growth goes away from the centre of the plant rather than inward. For hedges, a slight taper — wider at the base than at the top — lets light reach the lower branches. One of the main reasons hedge bottoms go bare over time is that the top fans out and shades everything below it.
Don't shear rhododendrons or azaleas into hard geometric shapes. They don't regenerate from old wood the way laurel does, and over a few years of box-cutting you'll end up with dead sections inside the plant and a thin outer shell of foliage. These are plants to hand-prune selectively, removing the oldest canes and shaping gently rather than shearing flat.
For laurel hedges that have grown significantly out of hand — adding several feet of height or width over the last few years — it's worth doing a proper reduction now rather than a light trim. April is ideal: the plant has the whole growing season to fill back in, and you'll be dealing with less material than you would in midsummer.
The Cleanup Reality
This is the part of spring pruning that surprises people the most, especially if they haven't done a significant cut-back before. One mature laurel hedge in Nanaimo or Lantzville can produce a substantial volume of material — far more than fits in a garden waste bin, and more than most homeowners want to deal with. A single full-day hedge job can generate hundreds of kilograms of clippings.
When WCL does hedge and shrub work, we bring the right equipment and haul everything to the composting facility. What's left is a tidy, shaped plant and a clean yard. The crew arrives in uniform, works efficiently, and doesn't leave you with a pile of clippings to sort out afterward. For properties in Nanaimo, Lantzville, and Parksville, that full cleanup is part of every job — it's not an add-on.
If you have significant hedge work that needs doing this spring — whether it's a seasonal tidy-up or a more substantial reduction — April is the right time to get it scheduled. Once spring growth accelerates through May, hedges add new material quickly, and jobs that looked straightforward in April get significantly larger by June.