Repotting guide

When & how to repot Anadendrum Michaelii (Anadendrum michaelii)

Also called Michael's anadendrum.

More about anadendrum michaelii

About Anadendrum Michaelii

Anadendrum michaelii · also called Michael's anadendrum · houseplant

Anadendrum michaelii is a rare Southeast Asian climbing aroid grown for its glossy, slightly iridescent lance-shaped leaves and neat vining habit. A relative of Rhaphidophora and Epipremnum, it is a true-jungle understory climber that wants warm, humid, shaded conditions, a moss pole to climb and a loose, fast-draining aroid mix to develop larger adult foliage.

Mature size: Climbs 1-2 m indoors with adult leaves typically 10-20 cm long; a relatively compact, slow-to-moderate grower in cultivation.

How to tell anadendrum michaelii needs repotting

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

Every 12–18 months — sooner if roots show fast. Anadendrum Michaelii's growth habit — slender hemiepiphytic vining climber that attaches with aerial roots and produces larger adult leaves once it climbs a moss pole or support. — sets the pace. Anadendrum michaelii is a rare Southeast Asian climbing aroid grown for its glossy, slightly iridescent lance-shaped leaves and neat vining habit. A relative of Rhaphidophora and Epipremnum, it is a true-jungle understory climber that wants warm, humid, shaded conditions, a moss pole to climb and a loose, fast-draining aroid mix to develop larger adult foliage.

What size pot to step anadendrum michaelii up to

Step up one pot size — about 2–3 cm (an inch) wider. Anadendrum Michaelii 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 anadendrum michaelii

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

Time it for spring. Repot anadendrum michaelii 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 anadendrum michaelii out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh loose, well-aerated aroid 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 anadendrum michaelii 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 anadendrum michaelii

Anadendrum Michaelii wants loose, well-aerated aroid mix. Use orchid bark, perlite, coco coir and charcoal so the roots get plenty of air. A pure peat or all-purpose soil stays too wet for these fine epiphytic roots. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting anadendrum michaelii — frequently asked questions

How often should you repot anadendrum michaelii?

Every 12–18 months — sooner if roots show fast for anadendrum michaelii. Repot anadendrum michaelii 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 loose, well-aerated aroid mix. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does anadendrum michaelii need?

When is the best time of year to repot anadendrum michaelii?

Can you put anadendrum michaelii straight into a much bigger pot?

No. Even a fast-growing anadendrum michaelii 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 anadendrum michaelii after repotting?

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