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Repotting guide

When & how to repot Pandan (Pandanus amaryllifolius)

Also called Pandan, Screwpine, Fragrant Screwpine.

More about pandan

About Pandan

Pandanus amaryllifolius · also called Pandan, Screwpine · herb

Pandanus amaryllifolius is a tropical screwpine grown for its long, strap-like fragrant leaves, which lend a sweet, grassy, jasmine-rice aroma to Southeast Asian cooking. Unlike its spiny relatives it has soft-edged leaves and is the only fragrant Pandanus, rarely flowering and never setting seed. It needs steady warmth, high humidity and bright light.

Mature size: Usually 1-1.5 m tall and wide in cultivation, forming a spreading clump of arching leaves.

Watch for — Root rot from overwatering: Soggy, poorly drained soil rots the roots. Use a free-draining mix and let the surface dry slightly between waterings.

How to tell pandan needs repotting

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

Pot on seedlings as they grow; not a perennial repot. Pandanis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Clumping tropical evergreen forming a rosette-like fan of arching strap leaves, spreading slowly by basal offsets and aerial prop roots..

What size pot to step pandan up to

Pot pandan on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check.

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 pandan

Pot pandan on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.

Step-by-step: repotting pandan

  1. Pot on before it is root-bound. Check pandan regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
  2. Step up one or two sizes. Choose the next container up — not a giant one. Cold, wet, unused soil around a small root system stalls seedlings.
  3. Knock it out gently. Support the stem, tip the pot, and ease the rootball out without breaking it. A little teasing of circled roots at the base is fine.
  4. Pot into rich mix. Set it into fresh rich, moisture-retentive, well-drained mix at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
  5. Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water pandan in well and keep it in bright light; a freshly potted-on seedling can wilt for a day while roots settle, so do not overcompensate by drowning it. Do not fertilise for about 1 week — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for pandan

Pandan wants rich, moisture-retentive, well-drained mix. Wants fertile, humus-rich soil that stays moist yet drains well, slightly acidic to neutral. A loam-based mix amended with compost and perlite gives both moisture retention and the drainage the roots need. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting pandan — frequently asked questions

How often should you repot pandan?

Pot on seedlings as they grow; not a perennial repot for pandan. Pandan is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into rich, moisture-retentive, well-drained mix so the roots never circle the cell, ending in a large final container. A root-bound transplant stalls and never fully recovers.

What size pot does pandan need?

Pot pandan on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check. 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 pandan?

Pot pandan on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.

Can you put pandan straight into a much bigger pot?

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

Not immediately. Wait about 1 week after repotting pandan. 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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