Repotting guide

When & how to repot Harlequin Flower (Sparaxis tricolor)

Also called Harlequin flower, Wand flower, Three-coloured sparaxis.

More about harlequin flower

About Harlequin Flower

Sparaxis tricolor · also called Harlequin flower, Wand flower · flowering

Sparaxis tricolor is a cormous perennial native to the Western Cape of South Africa, producing cheerful funnel-shaped blooms in red, orange, or purple with a vivid yellow throat ringed in black during spring. It thrives in full sun and sharply drained, sandy soil, and must be kept completely dry during its summer dormancy or the corms will rot. In the UK and cooler US climates it is best grown under glass in autumn-planted pots and kept frost-free; in USDA zones 9–10 it naturalises freely in the ground. It is considered mildly toxic to pets and should be kept out of reach of cats and dogs.

Mature size: 30–45 cm tall, 5–10 cm spread per corm

Watch for — Corm rot: The leading cause of failure; caused by moisture during summer dormancy. Always dry corms completely before storing or in a pot, and ensure the container has drainage holes with no saucer left filled with water.

How to tell harlequin flower needs repotting

Repotting on a calendar is less reliable than reading the plant. For harlequin flower, watch for these signs:

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

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 harlequin flower

Every 2–3 years, into bone-dry mix. Harlequin Flower's growth habit — clump-forming cormous perennial producing a fan of narrow, upright leaves to 30 cm and loose spikes of up to five flowers on stems to 45 cm. — sets the pace. Sparaxis tricolor is a cormous perennial native to the Western Cape of South Africa, producing cheerful funnel-shaped blooms in red, orange, or purple with a vivid yellow throat ringed in black during spring. It thrives in full sun and sharply drained, sandy soil, and must be kept completely dry during its summer dormancy or the corms will rot. In the UK and cooler US climates it is best grown under glass in autumn-planted pots and kept frost-free; in USDA zones 9–10 it naturalises freely in the ground. It is considered mildly toxic to pets and should be kept out of reach of cats and dogs.

What size pot to step harlequin flower up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Harlequin Flower stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

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 harlequin flower

Spring or summer, while harlequin flower is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting harlequin flower

Repot dry. Do not water harlequin flower for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty well-drained sandy loam or gritty compost ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set harlequin flower at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep harlequin flower completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for harlequin flower

Harlequin Flower wants well-drained sandy loam or gritty compost. Plant corms 8–10 cm deep in autumn in a loam-based compost with up to 50% added coarse grit or horticultural sand; good drainage is non-negotiable. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting harlequin flower — frequently asked questions

How often should you repot harlequin flower?

Every 2–3 years, into bone-dry mix for harlequin flower. Repot harlequin flower every 2–3 years into a snug pot of well-drained sandy loam or gritty compost, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does harlequin flower need?

When is the best time of year to repot harlequin flower?

Should you water harlequin flower after repotting?

No — not straight away. Repot harlequin flower into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise harlequin flower after repotting?

Not immediately. Wait about 3 weeks after repotting harlequin flower. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.