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Repotting guide

When & how to repot Bignay (Antidesma bunius)

Also called Bignay, Chinese laurel, Currant tree.

More about bignay

About Bignay

Antidesma bunius · also called Bignay, Chinese laurel · tropical

Bignay is a tropical evergreen tree grown for clusters of small currant-like fruit that ripen from green through red to black, used in jams, wine and juice. It needs warmth, full sun and well-drained soil, and is frost-tender. Plants are typically dioecious, so a male is needed to pollinate fruiting females. Fast-growing and ornamental, with glossy foliage.

Mature size: 5-10 m tall in the tropics; readily kept to 2-3 m in a container with pruning.

Watch for — Fungal leaf spot: Occurs in stagnant, very humid conditions; improve airflow, avoid wetting foliage late in the day and remove affected leaves.

How to tell bignay needs repotting

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

Every 2–3 years; top-dress in the in-between years. Bignay's growth habit — upright, fast-growing evergreen tree with a dense rounded crown, glossy leathery leaves and long drooping strings of small berries; usually dioecious, needing both sexes for fruit. — sets the pace. Bignay is a tropical evergreen tree grown for clusters of small currant-like fruit that ripen from green through red to black, used in jams, wine and juice. It needs warmth, full sun and well-drained soil, and is frost-tender. Plants are typically dioecious, so a male is needed to pollinate fruiting females. Fast-growing and ornamental, with glossy foliage.

What size pot to step bignay up to

Move up exactly one pot size. A heavy bignay 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 bignay

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

  1. Consider top-dressing first. If bignay 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 fertile, 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 bignay in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave bignay 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 bignay

Bignay wants fertile, well-drained loam. Adapts to a wide pH range (5.5-7.5) and various soils including sandy and clay-loam, provided drainage is good. Enrich containers with compost and add grit for free drainage. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting bignay — frequently asked questions

How often should you repot bignay?

Every 2–3 years; top-dress in the in-between years for bignay. Fully repot bignay 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, 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 bignay need?

Move up exactly one pot size. A heavy bignay 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 bignay?

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

For a big, heavy bignay, 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 bignay after repotting?

Not immediately. Wait about 4 weeks after repotting bignay. 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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