Repotting guide

When & how to repot Billy buttons (Craspedia globosa)

Also called Billy buttons, Drumstick flower, Bachelor's buttons, Woollyheads.

More about billy buttons

About Billy buttons

Craspedia globosa · also called Billy buttons, Drumstick flower · flowering

An Australian native perennial grown as an annual in most temperate climates, producing perfectly spherical golden-yellow drumstick heads on long, wiry silver-grey stems. Outstanding for dried flower arrangements. Thrives in full sun in sharply drained, low-fertility soil with minimal water once established.

Mature size: 45–75 cm tall (18–30 in), spread 20–30 cm

Watch for — Crown and root rot: The most frequent failure, especially in UK winters. Standing moisture around the crown is fatal. Plant in raised beds or grit-amended soil; avoid overwatering and protect from winter wet with a cloche or cold frame.

How to tell billy buttons needs repotting

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

Every 2–3 years, into bone-dry mix. Billy buttons's growth habit — rosette-forming; produces tall, straight scapes topped with globe-shaped flowerheads — sets the pace. An Australian native perennial grown as an annual in most temperate climates, producing perfectly spherical golden-yellow drumstick heads on long, wiry silver-grey stems. Outstanding for dried flower arrangements. Thrives in full sun in sharply drained, low-fertility soil with minimal water once established.

What size pot to step billy buttons up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Billy buttons 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 billy buttons

Spring or summer, while billy buttons 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 billy buttons

Repot dry. Do not water billy buttons 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 sharply drained, gritty or sandy, low-fertility soil 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 billy buttons 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 billy buttons 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 billy buttons

Billy buttons wants sharply drained, gritty or sandy, low-fertility soil. Requires excellent drainage above all else; native to free-draining rocky or gravelly soils. Incorporate grit or coarse sand into heavy soils. pH 6.0–7.5. Avoid rich, moisture-retentive mixes — fertile soils produce floppy growth and are fatal in wet winters. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting billy buttons — frequently asked questions

How often should you repot billy buttons?

Every 2–3 years, into bone-dry mix for billy buttons. Repot billy buttons every 2–3 years into a snug pot of sharply drained, gritty or sandy, low-fertility soil, 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 billy buttons need?

When is the best time of year to repot billy buttons?

Should you water billy buttons after repotting?

No — not straight away. Repot billy buttons 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 billy buttons after repotting?

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