Repotting guide

When & how to repot Pseuderanthemum carruthersii var. carruthersii (Pseuderanthemum carruthersii var. carruthersii)

Also called Yellow-splashed pseuderanthemum.

More about pseuderanthemum carruthersii var. carruthersii

About Pseuderanthemum carruthersii var. carruthersii

Pseuderanthemum carruthersii var. carruthersii · also called Yellow-splashed pseuderanthemum · tropical

Pseuderanthemum carruthersii var. carruthersii is a tender tropical shrub prized for foliage splashed and mottled with golden-yellow over green. Native to the Pacific Islands, it wants warmth, high humidity, and bright filtered light to keep its variegation vivid. Grown as a colourful houseplant or, in frost-free regions, a compact ornamental hedge.

Mature size: Around 0.6-1 m indoors; up to roughly 1.5 m as an outdoor shrub in tropical climates.

How to tell pseuderanthemum carruthersii var. carruthersii needs repotting

Repotting on a calendar is less reliable than reading the plant. For pseuderanthemum carruthersii var. carruthersii, 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 pseuderanthemum carruthersii var. carruthersii 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 pseuderanthemum carruthersii var. carruthersii

Every 12–18 months — sooner if roots show fast. Pseuderanthemum carruthersii var. carruthersii's growth habit — upright, well-branched evergreen shrub with opposite ovate leaves; pinch growing tips to encourage bushiness and prune lightly to maintain shape. — sets the pace. Pseuderanthemum carruthersii var. carruthersii is a tender tropical shrub prized for foliage splashed and mottled with golden-yellow over green. Native to the Pacific Islands, it wants warmth, high humidity, and bright filtered light to keep its variegation vivid. Grown as a colourful houseplant or, in frost-free regions, a compact ornamental hedge.

What size pot to step pseuderanthemum carruthersii var. carruthersii up to

Step up one pot size — about 2–3 cm (an inch) wider. Pseuderanthemum carruthersii var. carruthersii 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 pseuderanthemum carruthersii var. carruthersii

Early spring, just as new growth restarts, is the ideal window for pseuderanthemum carruthersii var. carruthersii. 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 pseuderanthemum carruthersii var. carruthersii

Time it for spring. Repot pseuderanthemum carruthersii var. carruthersii 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 pseuderanthemum carruthersii var. carruthersii out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh fertile, well-draining, humus-rich potting mix 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 pseuderanthemum carruthersii var. carruthersii 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 pseuderanthemum carruthersii var. carruthersii

Pseuderanthemum carruthersii var. carruthersii wants fertile, well-draining, humus-rich potting mix. A peat-free houseplant mix with added compost and perlite or bark gives moisture retention and aeration. Slightly acidic to neutral pH (6.0-7.0) is ideal. Always use a container with drainage holes. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting pseuderanthemum carruthersii var. carruthersii — frequently asked questions

How often should you repot pseuderanthemum carruthersii var. carruthersii?

Every 12–18 months — sooner if roots show fast for pseuderanthemum carruthersii var. carruthersii. Repot pseuderanthemum carruthersii var. carruthersii 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 fertile, well-draining, humus-rich potting mix. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does pseuderanthemum carruthersii var. carruthersii need?

When is the best time of year to repot pseuderanthemum carruthersii var. carruthersii?

Can you put pseuderanthemum carruthersii var. carruthersii straight into a much bigger pot?

No. Even a fast-growing pseuderanthemum carruthersii var. carruthersii 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 pseuderanthemum carruthersii var. carruthersii after repotting?

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