Repotting guide

When & how to repot Port St. Johns Creeper (Pandorea ricasoliana)

Also called Port St. Johns Creeper, Pink Trumpet Creeper.

More about port st. johns creeper

About Port St. Johns Creeper

Pandorea ricasoliana · also called Port St. Johns Creeper, Pink Trumpet Creeper · tropical

A striking South African twining climber in the Bignoniaceae family, producing generous clusters of soft rose-pink trumpet flowers through summer and autumn. Valued for its vigour, glossy evergreen foliage, and tolerance of coastal conditions. Suits warm, frost-free gardens where it will rapidly clothe walls, pergolas, and fences.

Mature size: 5–8 m (16–26 ft)

Watch for — Frost damage: Foliage and stems can be damaged by even light frosts. In cooler zones, grow against a warm wall for protection, or bring potted specimens under glass before first frost.

How to tell port st. johns creeper needs repotting

Repotting on a calendar is less reliable than reading the plant. For port st. johns creeper, watch for these signs:

Roots poking out of the drainage holes or coiling visibly around the inside of the pot.
You are watering far more often than you used to because the rootball dries out within a day or two.
Water runs straight through and out the bottom without soaking in.
Top growth has slowed or new port st. johns creeper leaves are noticeably smaller than older ones despite good light.

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 port st. johns creeper

Every 12–18 months — sooner if roots show fast. Port St. Johns Creeper's growth habit — vigorous evergreen twining climber — sets the pace. A striking South African twining climber in the Bignoniaceae family, producing generous clusters of soft rose-pink trumpet flowers through summer and autumn. Valued for its vigour, glossy evergreen foliage, and tolerance of coastal conditions. Suits warm, frost-free gardens where it will rapidly clothe walls, pergolas, and fences.

What size pot to step port st. johns creeper up to

Step up one pot size — about 2–3 cm (an inch) wider. Port St. Johns Creeper grows fast, so it will fill that space within a season, but jumping several sizes at once still backfires: the unused soil stays soggy and rots even a vigorous root system. One size at a time, every year or so, is the rhythm.

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 port st. johns creeper

Early spring, just as new growth restarts, is the ideal window for port st. johns creeper. 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 port st. johns creeper

Time it for spring. Repot port st. johns creeper in early spring as growth restarts so it re-roots quickly into the fresh soil.
Choose one size up. Pick a pot about 2–3 cm wider with drainage holes. One step only — a much bigger pot stays soggy and rots roots.
Ease the plant out. Water lightly the day before, then tip port st. johns creeper out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh well-drained loam to sandy loam in the new pot, set the plant so its soil line is unchanged, and backfill, firming lightly.
Water and pause feeding. Water once to settle the soil. Hold off fertiliser for about a month — fresh mix already has nutrients and feeding now burns new roots.

Aftercare

Water port st. johns creeper once to settle the soil, then let the surface dry before watering again — fresh mix around the roots stays wetter than the old compacted ball, so the commonest post-repot mistake is overwatering. Keep it out of direct sun for a week or two while roots re-establish. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for port st. johns creeper

Port St. Johns Creeper wants well-drained loam to sandy loam. Tolerates a range of soils including coastal sandy conditions. Avoid heavy, waterlogged clay. pH 6.0–7.5. Incorporate organic matter at planting to support establishment. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting port st. johns creeper — frequently asked questions

How often should you repot port st. johns creeper?

Every 12–18 months — sooner if roots show fast for port st. johns creeper. Repot port st. johns creeper roughly every 12–18 months, in early spring as growth restarts. It grows fast and circles its pot quickly, so step up one size (about 2–3 cm wider) into fresh well-drained loam to sandy loam. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does port st. johns creeper need?

When is the best time of year to repot port st. johns creeper?

Can you put port st. johns creeper straight into a much bigger pot?

No. Even a fast-growing port st. johns creeper should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise port st. johns creeper after repotting?

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