Repotting guide

When & how to repot Pacific Dogwood (Cornus nuttallii)

Also called Pacific Dogwood, Mountain Dogwood, Western Flowering Dogwood, Nuttall's Dogwood.

More about pacific dogwood

About Pacific Dogwood

Cornus nuttallii · also called Pacific Dogwood, Mountain Dogwood · flowering

Pacific dogwood is the western counterpart to Cornus florida, native to forests of the US Pacific Coast and British Columbia. It bears large, showy white bracts — typically 4–6, sometimes 6–8 — in spring, often reblooming in autumn, with vivid orange-red autumn foliage. Stunning in its native range but notoriously difficult to establish outside Pacific Coast conditions.

Mature size: 6–20 m tall, 4–8 m wide (variable; forest specimens may exceed 20 m)

Watch for — Crown canker and Phytophthora: Cornus nuttallii is highly susceptible to crown and root rot caused by Phytophthora species outside its ideal conditions; excellent drainage and a well-prepared, organic-rich planting site with no waterlogging are the primary preventive measures.

How to tell pacific dogwood needs repotting

Repotting on a calendar is less reliable than reading the plant. For pacific dogwood, watch for these signs:

Thick roots out of the drainage holes, or circling the surface and lifting the plant.
The pot dries out unusually fast and pacific dogwood wilts between waterings it used to shrug off.
The plant is visibly top-heavy and tips over easily.
Stalled growth and small new leaves over a full season — though with a big specimen, top-dressing is often the better first response before a full repot.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot pacific dogwood

Every 2–3 years; top-dress in the in-between years. Pacific Dogwood's growth habit — medium-sized deciduous tree with a pyramidal to oval crown when young, broadening with age. branching is more upright than cornus florida, giving a less distinctly tiered appearance but a more formal silhouette. bark is attractively checkered on older trees. — sets the pace. Pacific dogwood is the western counterpart to Cornus florida, native to forests of the US Pacific Coast and British Columbia. It bears large, showy white bracts — typically 4–6, sometimes 6–8 — in spring, often reblooming in autumn, with vivid orange-red autumn foliage. Stunning in its native range but notoriously difficult to establish outside Pacific Coast conditions.

What size pot to step pacific dogwood up to

Move up exactly one pot size. A heavy pacific dogwood dropped into a vastly bigger pot sits in a reservoir of wet soil its roots cannot reach, which rots them and destabilises the plant. In the years between repots, lift off and replace the top 3–5 cm of soil (top-dressing) instead — it refreshes nutrients without the shock of a full repot.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot pacific dogwood

Early spring, just as new growth restarts, is the ideal window for pacific dogwood. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting pacific dogwood

Consider top-dressing first. If pacific dogwood is not badly root-bound, scrape off and replace the top 3–5 cm of soil instead — far less shock for a big plant that hates moving.
Get help and one size up. For a full repot, choose a pot just one size larger. A heavy plant needs two people and a stable, free-draining pot.
Ease it out on its side. Lay the plant down, slide the pot off, and gently loosen the outer roots. Do not bare-root a mature specimen.
Repot at the same depth. Add fresh moist, humus-rich, well-drained slightly acidic woodland soil beneath and around the rootball, keeping the original soil line. Firm it so the trunk is stable and upright.
Water and leave it put. Water thoroughly, then leave pacific dogwood in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave pacific dogwood in exactly the same spot and light it was in before — moving and repotting at the same time is what makes a big specimen drop leaves. Water it in well, then let the top of the soil dry before watering again so the larger volume of fresh soil does not stay sodden. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for pacific dogwood

Pacific Dogwood wants moist, humus-rich, well-drained slightly acidic woodland soil. Acidic pH 5.5–6.5 rich in decomposed organic matter, closely mimicking the duff layer of its native forests. Amend planting soil deeply with compost and leaf mould. Avoid alkaline, compacted, or waterlogged conditions; good drainage is essential to prevent trunk rot at the base. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting pacific dogwood — frequently asked questions

How often should you repot pacific dogwood?

Every 2–3 years; top-dress in the in-between years for pacific dogwood. Fully repot pacific dogwood only every 2–3 years; in the in-between years just top-dress the top 3–5 cm of soil. Step up one pot size in spring with moist, humus-rich, well-drained slightly acidic woodland soil. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does pacific dogwood need?

When is the best time of year to repot pacific dogwood?

Should you top-dress or fully repot pacific dogwood?

For a big, heavy pacific dogwood, top-dressing — replacing the top 3–5 cm of soil — is the gentler option most years, with a full repot only every 2–3 years. A mature specimen sulks and drops leaves when fully repotted, so do it as rarely as the roots allow.

Should you fertilise pacific dogwood after repotting?

Not immediately. Wait about 4 weeks after repotting pacific dogwood. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.