Repotting guide

When & how to repot Kokum (Garcinia indica)

Also called Kokum, Goa Butter Tree, Mangosteen Oil Tree.

More about kokum

About Kokum

Garcinia indica · also called Kokum, Goa Butter Tree · tropical

Kokum is a slender, slow-growing evergreen tree native to India's Western Ghats, prized for its deep-purple, astringent fruits used in South Asian cuisine, drinks, and traditional medicine. It requires humid tropical conditions with ample rainfall and excellent drainage. Fruiting from seed takes many years; sourcing grafted plants is strongly recommended.

Mature size: Up to 15 m (50 ft) tall in native conditions; typically maintained at 3–6 m in cultivation.

Watch for — Root rot in poorly drained soils: Despite high water needs, Kokum is intolerant of waterlogged roots. Ensure containers have generous drainage holes and use a free-draining mix. Raised beds are preferable in heavy garden soil.

How to tell kokum needs repotting

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

Every 2–3 years; top-dress in the in-between years. Kokum's growth habit — slender, slow-growing evergreen tree with gracefully drooping branches and a narrow crown. extremely slow to fruit from seed — reportedly 30+ years in some references; grafted trees fruit much sooner. — sets the pace. Kokum is a slender, slow-growing evergreen tree native to India's Western Ghats, prized for its deep-purple, astringent fruits used in South Asian cuisine, drinks, and traditional medicine. It requires humid tropical conditions with ample rainfall and excellent drainage. Fruiting from seed takes many years; sourcing grafted plants is strongly recommended.

What size pot to step kokum up to

Move up exactly one pot size. A heavy kokum 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 kokum

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

Consider top-dressing first. If kokum 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 lateritic loam or sandy loam with organic matter 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 kokum in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave kokum 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 kokum

Kokum wants lateritic loam or sandy loam with organic matter. Naturally found in lateritic and alluvial soils to about 100 cm depth. Preferred pH approximately 5.5–7.5. Excellent drainage is essential despite high water demand. Amend containers with compost and perlite; mulch heavily to retain soil moisture and moderate 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 kokum — frequently asked questions

How often should you repot kokum?

Every 2–3 years; top-dress in the in-between years for kokum. Fully repot kokum 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 lateritic loam or sandy loam with organic matter. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does kokum need?

When is the best time of year to repot kokum?

Should you top-dress or fully repot kokum?

For a big, heavy kokum, 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 kokum after repotting?

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