Repotting guide

When & how to repot Gamboge Tree (Garcinia xanthochymus)

Also called Gamboge Tree, Mysore Gamboge, False Mangosteen, Himalayan Garcinia.

More about gamboge tree

About Gamboge Tree

Garcinia xanthochymus · also called Gamboge Tree, Mysore Gamboge · tropical

Gamboge Tree is a handsome, slow-growing evergreen from the Indian subcontinent with large glossy drooping leaves and attractive yellow-skinned, juicy fruits. Tolerant of shade and a wide range of soils, it is one of the more adaptable Garcinias. It suits large containers and warm conservatories, fruiting after 7–8 years from seed.

Mature size: 8–15 m (26–50 ft) tall in the ground. Maintained at 2–4 m in large containers.

Watch for — Root rot in heavy soils: Poor drainage leads to Phytophthora root rot. Plant in raised beds or containers with ample drainage material; avoid overwatering in cool conditions when growth slows.

How to tell gamboge tree needs repotting

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

Every 2–3 years; top-dress in the in-between years. Gamboge Tree's growth habit — evergreen tree with a dense pyramidal crown and large, glossy, pendulous leaves. very slow-growing; seedlings take 7–8 years to fruit. mature trees are ornamentally striking even outside fruit season. — sets the pace. Gamboge Tree is a handsome, slow-growing evergreen from the Indian subcontinent with large glossy drooping leaves and attractive yellow-skinned, juicy fruits. Tolerant of shade and a wide range of soils, it is one of the more adaptable Garcinias. It suits large containers and warm conservatories, fruiting after 7–8 years from seed.

What size pot to step gamboge tree up to

Move up exactly one pot size. A heavy gamboge tree 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 gamboge tree

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

Consider top-dressing first. If gamboge tree 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 well-drained loamy or sandy loam, wide ph tolerance 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 gamboge tree in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave gamboge tree 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 gamboge tree

Gamboge Tree wants well-drained loamy or sandy loam, wide ph tolerance. Grows in most well-drained soils, including poor soils and those with a high pH. Preferred pH 6.0–7.5 (tolerates 5.5–8.0). Enrich with organic matter; avoid waterlogged conditions. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting gamboge tree — frequently asked questions

How often should you repot gamboge tree?

Every 2–3 years; top-dress in the in-between years for gamboge tree. Fully repot gamboge tree 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 well-drained loamy or sandy loam, wide ph tolerance. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does gamboge tree need?

When is the best time of year to repot gamboge tree?

Should you top-dress or fully repot gamboge tree?

For a big, heavy gamboge tree, 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 gamboge tree after repotting?

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