Repotting guide

When & how to repot Dogwood (Cornus sanguinea)

Also called Common Dogwood, Dogwood, Bloody Twig, Pedwood.

More about dogwood

About Dogwood

Cornus sanguinea · also called Common Dogwood, Dogwood · flowering

Common Dogwood is a vigorous, deciduous native shrub of chalky and calcareous soils across England, Europe, and western Asia, widely grown for its vivid crimson-to-purple winter stems, clusters of white flowers in June, and glossy black berries. It is extremely hardy, tolerates shade and exposed sites, and is the most important hedgerow and wildlife-garden shrub for hard-pruning back annually in late winter to maximise coloured stem display. Berries and plant material are mildly toxic to cats and dogs.

Mature size: 2–4 m tall and wide if unpruned; kept to 60–90 cm by annual hard pruning in late winter.

How to tell dogwood needs repotting

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

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for dogwood) flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to 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 dogwood

Only every 2–4 years, when genuinely crowded. Dogwood is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Vigorous, suckering deciduous shrub with upright, arching stems that turn blood-red to deep purple in autumn and winter..

What size pot to step dogwood up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Dogwood positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping dogwood into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 dogwood

Early spring, just as new growth restarts, is the ideal window for 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 dogwood

Confirm it actually needs it. Slide dogwood out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip dogwood out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh well-drained to moist, alkaline to neutral loam, chalk, or clay, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water dogwood again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for dogwood

Dogwood wants well-drained to moist, alkaline to neutral loam, chalk, or clay. Thrives on chalk and limestone soils where many plants struggle; also grows well in heavy clay if not persistently waterlogged. Soil pH 6.0–8.0 is suitable. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting dogwood — frequently asked questions

How often should you repot dogwood?

Only every 2–4 years, when genuinely crowded for dogwood. Only repot dogwood every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using well-drained to moist, alkaline to neutral loam, chalk, or clay. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does dogwood need?

When is the best time of year to repot dogwood?

Does dogwood like to be root-bound?

Yes — dogwood genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise dogwood after repotting?

Not immediately. Wait about 4 weeks after repotting 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.