Repotting guide

When & how to repot Bird of paradise (Strelitzia reginae)

Also called crane flower, Strelitzia.

About Bird of paradise

Strelitzia reginae · also called crane flower, Strelitzia · flowering

Bird of paradise is a striking South African banana relative grown for its paddle leaves and crane-shaped orange flowers. Indoors it grows to roughly 1.5-2 m and needs the brightest spot in the house. Mildly toxic to pets.

Strelitzia reginae is endemic to the Eastern Cape and KwaZulu-Natal of South Africa, where it grows in coastal bush, riverbanks and clearings. Its rigid beak-like spathe sits perpendicular to the stem to form a durable perch for the sunbirds that pollinate it.

Grow in a rich but free-draining loamy mix; the thick fleshy roots resent waterlogging, and a slightly pot-bound clump actually flowers more reliably than one in an oversized container.

Mature size: 1.5-2 m indoors, 3-5 m outdoors

Watch for — No flowers: Plant must be 4-5 years old in a bright spot to flower indoors.

Sources: aspca.org, hort.extension.wisc.edu, en.wikipedia.org, powo.science.kew.org

How to tell bird of paradise needs repotting

Repotting on a calendar is less reliable than reading the plant. For bird of paradise, watch for these signs:

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for bird of paradise) flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

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 bird of paradise

Only every 2–4 years, when genuinely crowded. Bird of paradise is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Clumping evergreen with paddle leaves.

What size pot to step bird of paradise up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Bird of paradise positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping bird of paradise into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 bird of paradise

Early spring, just as new growth restarts, is the ideal window for bird of paradise. 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 bird of paradise

Confirm it actually needs it. Slide bird of paradise out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip bird of paradise out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh rich, well-drained loam, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water bird of paradise again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for bird of paradise

Bird of paradise wants rich, well-drained loam. Standard potting compost with 25% perlite; pH 5.5-7.0. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting bird of paradise — frequently asked questions

How often should you repot bird of paradise?

Only every 2–4 years, when genuinely crowded for bird of paradise. Only repot bird of paradise every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using rich, well-drained loam. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does bird of paradise need?

When is the best time of year to repot bird of paradise?

Does bird of paradise like to be root-bound?

Yes — bird of paradise genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise bird of paradise after repotting?

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