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Repotting guide

When & how to repot Soursop (Annona muricata)

Also called Soursop, Guanábana, Graviola.

More about soursop

About Soursop

Annona muricata · also called Soursop, Guanábana · tropical

Soursop is a tropical evergreen tree bearing large, spiny green fruit with tangy, creamy white pulp. The most heat-loving and frost-tender of the common Annonas, it needs consistent warmth, humidity, and well-drained soil. It fruits relatively young but cannot tolerate cold, so it is grown under glass outside the tropics.

Mature size: 4-8 m in tropical ground; kept to 2-3 m in containers and under glass with pruning.

Watch for — Root rot: Despite loving moisture, it rots in waterlogged or poorly drained soil. Use rich but free-draining media and never let pots stand in water.

How to tell soursop needs repotting

Repotting on a calendar is less reliable than reading the plant. For soursop, watch for these signs:

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 soursop

Every 2–3 years; top-dress in the in-between years. Soursop's growth habit — upright, small to medium evergreen tree with a fairly open, low-branching canopy and large glossy leaves. — sets the pace. Soursop is a tropical evergreen tree bearing large, spiny green fruit with tangy, creamy white pulp. The most heat-loving and frost-tender of the common Annonas, it needs consistent warmth, humidity, and well-drained soil. It fruits relatively young but cannot tolerate cold, so it is grown under glass outside the tropics.

What size pot to step soursop up to

Move up exactly one pot size. A heavy soursop 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 soursop

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

  1. Consider top-dressing first. If soursop 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.
  2. 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.
  3. 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.
  4. Repot at the same depth. Add fresh rich, well-drained loam beneath and around the rootball, keeping the original soil line. Firm it so the trunk is stable and upright.
  5. Water and leave it put. Water thoroughly, then leave soursop in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave soursop 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 soursop

Soursop wants rich, well-drained loam. Prefers fertile, deep, well-drained soil, pH 5.0-6.5, with plenty of organic matter. Sensitive to waterlogging and to cold, saline or compacted soils. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting soursop — frequently asked questions

How often should you repot soursop?

Every 2–3 years; top-dress in the in-between years for soursop. Fully repot soursop 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 rich, well-drained loam. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does soursop need?

Move up exactly one pot size. A heavy soursop 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. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot soursop?

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

Should you top-dress or fully repot soursop?

For a big, heavy soursop, 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 soursop after repotting?

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

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