Repotting guide

When & how to repot Nootka Cypress (Cupressus nootkatensis)

Also called Nootka Cypress, Yellow Cypress, Alaska Cedar, Nootka Falsecypress.

More about nootka cypress

About Nootka Cypress

Cupressus nootkatensis · also called Nootka Cypress, Yellow Cypress · flowering

A stately, slow-growing evergreen conifer native to the Pacific Coast of North America, from Alaska to Oregon. Its strongly drooping foliage sprays and conical crown are unmistakable. Highly cold-hardy and adaptable to wet, cool sites, it is a premier specimen tree for large gardens in temperate climates. Foliage has a sharp, resinous scent when crushed.

Mature size: 15–30 m tall, 5–8 m wide in cultivation; to 40 m in native stands

How to tell nootka cypress needs repotting

Repotting on a calendar is less reliable than reading the plant. For nootka cypress, 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 nootka cypress 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 nootka cypress

Every 2–3 years; top-dress in the in-between years. Nootka Cypress's growth habit — narrowly conical to columnar evergreen tree with strongly pendulous, flat sprays of scale-like foliage — sets the pace. A stately, slow-growing evergreen conifer native to the Pacific Coast of North America, from Alaska to Oregon. Its strongly drooping foliage sprays and conical crown are unmistakable. Highly cold-hardy and adaptable to wet, cool sites, it is a premier specimen tree for large gardens in temperate climates. Foliage has a sharp, resinous scent when crushed.

What size pot to step nootka cypress up to

Move up exactly one pot size. A heavy nootka cypress 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 nootka cypress

Early spring, just as new growth restarts, is the ideal window for nootka cypress. 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 nootka cypress

Consider top-dressing first. If nootka cypress 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 to wet, well-drained to poorly drained, acidic to neutral 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 nootka cypress in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave nootka cypress 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 nootka cypress

Nootka Cypress wants moist to wet, well-drained to poorly drained, acidic to neutral. Unusually tolerant of wet soils and seasonal waterlogging. Grows in acidic to neutral soils (pH 5.0–7.0). Also adapts to drier, rocky soils once established. Avoid hot, dry, alkaline sites. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting nootka cypress — frequently asked questions

How often should you repot nootka cypress?

Every 2–3 years; top-dress in the in-between years for nootka cypress. Fully repot nootka cypress 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 to wet, well-drained to poorly drained, acidic to neutral. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does nootka cypress need?

When is the best time of year to repot nootka cypress?

Should you top-dress or fully repot nootka cypress?

For a big, heavy nootka cypress, 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 nootka cypress after repotting?

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