Repotting guide

When & how to repot Strawberry globe amaranth (Gomphrena haageana)

Also called Strawberry globe amaranth, haage globe amaranth, orange globe amaranth.

More about strawberry globe amaranth

About Strawberry globe amaranth

Gomphrena haageana · also called Strawberry globe amaranth, haage globe amaranth · flowering

Strawberry globe amaranth produces bright orange-red to strawberry-coloured papery flowerheads on sturdy, well-branched stems through summer and autumn. A heat- and drought-tolerant Central American annual, it thrives in full sun and poor, well-drained soils. Its intensely coloured, everlasting flowers are superb for fresh and dried arrangements.

Mature size: 50–75 cm tall, 30–45 cm wide

Watch for — Crown and root rot: Phytophthora and Pythium cause collapse at the crown in poorly drained or overwatered soils. Ensure sharp drainage; raised beds or gritty compost mixes are advisable. Do not overwater during cool spells.

How to tell strawberry globe amaranth needs repotting

Repotting on a calendar is less reliable than reading the plant. For strawberry globe amaranth, watch for these signs:

Roots circling the bottom of the module or pot, or poking out of the drainage holes.
The seedling dries out within a day and growth has visibly stalled.
Roots are white and matted in a tight spiral when you tip the plant out.
It has outgrown its current container for the stage of the season — pot strawberry globe amaranth on before it becomes hard root-bound.

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 strawberry globe amaranth

Pot on seedlings as they grow; not a perennial repot. Strawberry globe amaranthis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Upright, multi-branched annual (short-lived perennial in frost-free zones) with hairy, lance-shaped mid-green leaves and vivid rounded bracts 2–3 cm in diameter on stiff, straight stems..

What size pot to step strawberry globe amaranth up to

Pot strawberry globe amaranth 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 strawberry globe amaranth

Pot strawberry globe amaranth 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 strawberry globe amaranth

Pot on before it is root-bound. Check strawberry globe amaranth regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
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.
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.
Pot into rich mix. Set it into fresh well-drained, sandy to loamy, low fertility at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water strawberry globe amaranth 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 strawberry globe amaranth

Strawberry globe amaranth wants well-drained, sandy to loamy, low fertility. Best in sandy loam or loam with excellent drainage. Tolerates poor, infertile soils; rich soils promote foliage over flowers. pH 5.5–7.0. Heavy clay must be amended with grit or raised beds used; standing water is fatal. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting strawberry globe amaranth — frequently asked questions

How often should you repot strawberry globe amaranth?

Pot on seedlings as they grow; not a perennial repot for strawberry globe amaranth. Strawberry globe amaranth is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into well-drained, sandy to loamy, low fertility 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 strawberry globe amaranth need?

When is the best time of year to repot strawberry globe amaranth?

Can you put strawberry globe amaranth straight into a much bigger pot?

No. Even a fast-growing strawberry globe amaranth 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 strawberry globe amaranth after repotting?

Not immediately. Wait about 1 week after repotting strawberry globe amaranth. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.