Repotting guide

When & how to repot Basketgrass (Oplismenus hirtellus 'Variegatus')

Also called Basketgrass, Variegated Basket Grass, Ribbon Grass.

More about basketgrass

About Basketgrass

Oplismenus hirtellus 'Variegatus' · also called Basketgrass, Variegated Basket Grass · houseplant

A fast-growing, trailing ornamental grass with narrow leaves striped in white, green, and rose-pink. Excellent in hanging baskets or as ground cover in conservatories. Needs bright indirect light to maintain its vivid variegation, regular watering during growth, and periodic hard cutting back as it becomes straggly after one to two years.

Mature size: 10–20 cm tall (4–8 in), trailing stems to 60 cm (24 in) or more

Watch for — Straggly, bare stems: Normal after 12–18 months as the plant ages. Cut back hard in early spring to encourage a flush of fresh, compact growth, or propagate new plants from stem cuttings and replace.

How to tell basketgrass needs repotting

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

Every 12–18 months — sooner if roots show fast. Basketgrass's growth habit — trailing, mat-forming annual/short-lived perennial grass; vigorous spreader — sets the pace. A fast-growing, trailing ornamental grass with narrow leaves striped in white, green, and rose-pink. Excellent in hanging baskets or as ground cover in conservatories. Needs bright indirect light to maintain its vivid variegation, regular watering during growth, and periodic hard cutting back as it becomes straggly after one to two years.

What size pot to step basketgrass up to

Step up one pot size — about 2–3 cm (an inch) wider. Basketgrass 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 basketgrass

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

Time it for spring. Repot basketgrass 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 basketgrass out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh standard peat-free potting compost with added perlite 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 basketgrass 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 basketgrass

Basketgrass wants standard peat-free potting compost with added perlite. Use a general-purpose peat-free potting mix enhanced with 20% perlite or horticultural grit for improved drainage. The plant tolerates a range of pH but performs best around 6.0–7.0. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting basketgrass — frequently asked questions

How often should you repot basketgrass?

Every 12–18 months — sooner if roots show fast for basketgrass. Repot basketgrass 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 standard peat-free potting compost with added perlite. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does basketgrass need?

When is the best time of year to repot basketgrass?

Can you put basketgrass straight into a much bigger pot?

No. Even a fast-growing basketgrass 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 basketgrass after repotting?

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