Repotting guide

When & how to repot Camu Camu (Myrciaria dubia)

Also called Camu Camu, Cacari, Camucamu.

More about camu camu

About Camu Camu

Myrciaria dubia · also called Camu Camu, Cacari · tropical

Camu Camu is a small Amazonian riverside shrub or tree producing cherry-sized, deep red to purple fruits with extraordinarily high vitamin C content — among the richest natural sources known. Native to flooded Amazonian rainforest, it tolerates periodic inundation and requires consistently moist to wet, acidic soil and high humidity to thrive in cultivation.

Mature size: 2–8 m tall (6–26 ft); typically 3–5 m (10–16 ft) in cultivation; often maintained as a large shrub

Watch for — Myrtle rust (Puccinia psidii): As a Myrtaceae member, Camu Camu is susceptible to Myrtle rust, a globally spreading fungal pathogen causing orange-yellow pustules on young growth. Remove infected material, apply copper or triazole fungicides preventatively, and avoid moving potentially infected plant material between properties.

How to tell camu camu needs repotting

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

Every 2–3 years; top-dress in the in-between years. Camu Camu's growth habit — multi-stemmed shrub or small tree; dense, evergreen canopy; cauliflorous fruiting on older branches and trunk — sets the pace. Camu Camu is a small Amazonian riverside shrub or tree producing cherry-sized, deep red to purple fruits with extraordinarily high vitamin C content — among the richest natural sources known. Native to flooded Amazonian rainforest, it tolerates periodic inundation and requires consistently moist to wet, acidic soil and high humidity to thrive in cultivation.

What size pot to step camu camu up to

Move up exactly one pot size. A heavy camu camu 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 camu camu

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

Consider top-dressing first. If camu camu 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 acidic, humus-rich, moisture-retentive loam; tolerates waterlogged, seasonally flooded conditions 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 camu camu in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave camu camu 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 camu camu

Camu Camu wants acidic, humus-rich, moisture-retentive loam; tolerates waterlogged, seasonally flooded conditions. Requires acidic soil (pH 4.0–6.0) matching its Amazonian floodplain origin. Thrives in organic-matter-rich, moisture-retentive soils. Unlike almost all other cultivated fruit trees, it tolerates and even thrives with periodic waterlogging. Avoid alkaline, sandy, or well-draining soils that dry out quickly. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting camu camu — frequently asked questions

How often should you repot camu camu?

Every 2–3 years; top-dress in the in-between years for camu camu. Fully repot camu camu 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 acidic, humus-rich, moisture-retentive loam; tolerates waterlogged, seasonally flooded conditions. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does camu camu need?

When is the best time of year to repot camu camu?

Should you top-dress or fully repot camu camu?

For a big, heavy camu camu, 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 camu camu after repotting?

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