Repotting guide

When & how to repot Muir's Rhinephyllum (Rhinephyllum muirii)

Also called Muir's Rhinephyllum.

More about muir's rhinephyllum

About Muir's Rhinephyllum

Rhinephyllum muirii · also called Muir's Rhinephyllum · houseplant

A tiny, night-blooming mesemb from the Little Karoo, Western Cape, South Africa, forming small clumps of paired fleshy leaves on a branched caudex. Its pleasingly scented yellowish-white flowers, reminiscent of pear drops, open at night in spring and summer. Best grown in a shallow, very free-draining pot in bright light with a dry winter rest.

Mature size: Individual leaf pairs 10–25 mm long by 5–10 mm wide; clumps reach 5–8 cm across and under 5 cm tall

Watch for — Sciara fly (fungus gnats): Larvae attack the fine roots and can devastate seedlings. Use a gritty top-dressing of coarse sand or grit, allow the soil surface to dry fully between waterings, and treat with a soil drench of neem oil or Bacillus thuringiensis israelensis.

How to tell muir's rhinephyllum needs repotting

Repotting on a calendar is less reliable than reading the plant. For muir's rhinephyllum, 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 muir's rhinephyllum

Every 2–3 years, into bone-dry mix. Muir's Rhinephyllum's growth habit — dwarf, clump-forming subshrub growing on a fleshy caudex with short, branched stems; leaves in pairs — sets the pace. A tiny, night-blooming mesemb from the Little Karoo, Western Cape, South Africa, forming small clumps of paired fleshy leaves on a branched caudex. Its pleasingly scented yellowish-white flowers, reminiscent of pear drops, open at night in spring and summer. Best grown in a shallow, very free-draining pot in bright light with a dry winter rest.

What size pot to step muir's rhinephyllum up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Muir's Rhinephyllum 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 muir's rhinephyllum

Spring or summer, while muir's rhinephyllum 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 muir's rhinephyllum

Repot dry. Do not water muir's rhinephyllum 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 very free-draining mineral succulent mix 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 muir's rhinephyllum 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 muir's rhinephyllum 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 muir's rhinephyllum

Muir's Rhinephyllum wants very free-draining mineral succulent mix. Blend equal parts low-nutrient cactus compost, coarse sand, and perlite or pumice. Good drainage and a dry atmosphere are critical — Rhinephyllum is intolerant of stagnant wet soil. Use a shallow terracotta pot to encourage rapid drying. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting muir's rhinephyllum — frequently asked questions

How often should you repot muir's rhinephyllum?

Every 2–3 years, into bone-dry mix for muir's rhinephyllum. Repot muir's rhinephyllum every 2–3 years into a snug pot of very free-draining mineral succulent mix, 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 muir's rhinephyllum need?

When is the best time of year to repot muir's rhinephyllum?

Should you water muir's rhinephyllum after repotting?

No — not straight away. Repot muir's rhinephyllum 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 muir's rhinephyllum after repotting?

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