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Repotting guide

When & how to repot Rough-leaved Cape Mallow (Anisodontea scabrosa)

Also called Rough-leaved Cape Mallow, Rough-leaf African Mallow, Hairy Mallow, Pink Mallow.

More about rough-leaved cape mallow

About Rough-leaved Cape Mallow

Anisodontea scabrosa · also called Rough-leaved Cape Mallow, Rough-leaf African Mallow · flowering

Anisodontea scabrosa is a vigorous, evergreen shrub from the Cape Floristic Region of South Africa, named for its distinctly rough, hairy leaves, and valued for its prolific, small, deep-pink to magenta hibiscus-like flowers produced from spring until the first frost or year-round in warm climates. It is larger and somewhat hardier than its close relative A. capensis, tolerating brief light frosts in a sheltered position, but performing best in USDA zones 8–11 with well-drained soil and full sun. Prune hard in early spring to prevent it becoming woody and bare at the base. No toxic principles are documented for the genus, though it is not formally listed as non-toxic by the ASPCA.

Mature size: 120–180 cm tall, 90–180 cm wide.

Watch for — Woody, bare-based growth: Plants become woody and bare at the base if not pruned regularly; cut back hard in early spring to 30–50 cm to stimulate fresh growth from the base and maintain a bushy, compact form.

How to tell rough-leaved cape mallow needs repotting

Repotting on a calendar is less reliable than reading the plant. For rough-leaved cape mallow, 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 rough-leaved cape mallow

Every 2–3 years; top-dress in the in-between years. Rough-leaved Cape Mallow's growth habit — upright, vigorously branching evergreen shrub with rough, hairy, lobed leaves on woody stems. — sets the pace. Anisodontea scabrosa is a vigorous, evergreen shrub from the Cape Floristic Region of South Africa, named for its distinctly rough, hairy leaves, and valued for its prolific, small, deep-pink to magenta hibiscus-like flowers produced from spring until the first frost or year-round in warm climates. It is larger and somewhat hardier than its close relative A. capensis, tolerating brief light frosts in a sheltered position, but performing best in USDA zones 8–11 with well-drained soil and full sun. Prune hard in early spring to prevent it becoming woody and bare at the base. No toxic principles are documented for the genus, though it is not formally listed as non-toxic by the ASPCA.

What size pot to step rough-leaved cape mallow up to

Move up exactly one pot size. A heavy rough-leaved cape mallow 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 rough-leaved cape mallow

Early spring, just as new growth restarts, is the ideal window for rough-leaved cape mallow. 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 rough-leaved cape mallow

  1. Consider top-dressing first. If rough-leaved cape mallow 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 well-drained loam or sandy 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 rough-leaved cape mallow in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave rough-leaved cape mallow 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 rough-leaved cape mallow

Rough-leaved Cape Mallow wants well-drained loam or sandy loam. Tolerates a wide range of soil types (acid, neutral, or alkaline) and even poor, lean soils, provided drainage is excellent; rich, wet soils encourage soft growth prone to disease. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting rough-leaved cape mallow — frequently asked questions

How often should you repot rough-leaved cape mallow?

Every 2–3 years; top-dress in the in-between years for rough-leaved cape mallow. Fully repot rough-leaved cape mallow 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 loam or sandy 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 rough-leaved cape mallow need?

Move up exactly one pot size. A heavy rough-leaved cape mallow 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 rough-leaved cape mallow?

Early spring, just as new growth restarts, is the ideal window for rough-leaved cape mallow. 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 rough-leaved cape mallow?

For a big, heavy rough-leaved cape mallow, 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 rough-leaved cape mallow after repotting?

Not immediately. Wait about 4 weeks after repotting rough-leaved cape mallow. 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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