Repotting guide

When & how to repot White Tabernaemontana (Tabernaemontana alba)

Also called White Tabernaemontana, White Milkwood, Jasmine Gardenia.

More about white tabernaemontana

About White Tabernaemontana

Tabernaemontana alba · also called White Tabernaemontana, White Milkwood · tropical

A large, fragrant tropical shrub or small tree native to Central America, Mexico, Cuba, and Colombia, with glossy evergreen foliage and abundant five-petalled white pinwheel flowers produced almost year-round. Grown for its ornamental value and heady jasmine-like scent. Suitable for tropical gardens and large containers in warm conservatories.

Mature size: 3–6 m in cultivation (10–20 ft); can reach up to 15 m in the wild; typically maintained at 1.5–2.5 m in large containers

Watch for — Leaf yellowing and drop: Yellowing lower leaves often indicate overwatering or waterlogged roots. Improve drainage and reduce watering frequency. General yellowing of multiple leaves can also signal nutrient deficiency — apply a balanced fertiliser and check soil pH is below 7.0.

How to tell white tabernaemontana needs repotting

Repotting on a calendar is less reliable than reading the plant. For white tabernaemontana, 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 white tabernaemontana 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 white tabernaemontana

Every 2–3 years; top-dress in the in-between years. White Tabernaemontana's growth habit — large, dense evergreen shrub or small tree with a spreading, rounded crown — sets the pace. A large, fragrant tropical shrub or small tree native to Central America, Mexico, Cuba, and Colombia, with glossy evergreen foliage and abundant five-petalled white pinwheel flowers produced almost year-round. Grown for its ornamental value and heady jasmine-like scent. Suitable for tropical gardens and large containers in warm conservatories.

What size pot to step white tabernaemontana up to

Move up exactly one pot size. A heavy white tabernaemontana 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 white tabernaemontana

Early spring, just as new growth restarts, is the ideal window for white tabernaemontana. 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 white tabernaemontana

Consider top-dressing first. If white tabernaemontana 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 fertile, humus-rich, well-draining loam or tropical potting mix 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 white tabernaemontana in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave white tabernaemontana 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 white tabernaemontana

White Tabernaemontana wants fertile, humus-rich, well-draining loam or tropical potting mix. Slightly acidic to neutral soil (pH 6.0–7.0) suits best. In containers, use a high-quality tropical or all-purpose potting mix amended with 20–25% perlite for drainage. Mulch around the root zone outdoors to retain moisture and moderate soil temperature. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting white tabernaemontana — frequently asked questions

How often should you repot white tabernaemontana?

Every 2–3 years; top-dress in the in-between years for white tabernaemontana. Fully repot white tabernaemontana 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 fertile, humus-rich, well-draining loam or tropical potting mix. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does white tabernaemontana need?

When is the best time of year to repot white tabernaemontana?

Should you top-dress or fully repot white tabernaemontana?

For a big, heavy white tabernaemontana, 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 white tabernaemontana after repotting?

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