Repotting guide

When & how to repot Neli's Rhombophyllum (Rhombophyllum nelii)

Also called Neli's Rhombophyllum, Nel's Elkhorn.

More about neli's rhombophyllum

About Neli's Rhombophyllum

Rhombophyllum nelii · also called Neli's Rhombophyllum, Nel's Elkhorn · houseplant

Rhombophyllum nelii is a dwarf South African mesemb succulent closely related to R. dolabriforme, forming tight rosettes of paired, keeled grey-green leaves. It is slightly more compact than its relative and produces bright yellow flowers in autumn. An undemanding windowsill succulent suited to collectors of miniature succulents.

Mature size: 3–7 cm tall; clumps to 10–15 cm across

Watch for — Etiolation (stretching): Insufficient light causes leaves to elongate and lean toward the window. Move to a brighter spot or supplement with a grow light positioned 15–20 cm above the plant.

How to tell neli's rhombophyllum needs repotting

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

Every 2–3 years, into bone-dry mix. Neli's Rhombophyllum's growth habit — compact clump-forming succulent; slowly produces offsets to form small colonies. — sets the pace. Rhombophyllum nelii is a dwarf South African mesemb succulent closely related to R. dolabriforme, forming tight rosettes of paired, keeled grey-green leaves. It is slightly more compact than its relative and produces bright yellow flowers in autumn. An undemanding windowsill succulent suited to collectors of miniature succulents.

What size pot to step neli's rhombophyllum up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Neli's Rhombophyllum 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 neli's rhombophyllum

Spring or summer, while neli's rhombophyllum 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 neli's rhombophyllum

Repot dry. Do not water neli's rhombophyllum 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 gritty cactus/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 neli's rhombophyllum 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 neli's rhombophyllum 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 neli's rhombophyllum

Neli's Rhombophyllum wants gritty cactus/succulent mix. Mix 50% commercial cactus compost with 50% coarse perlite, pumice, or horticultural grit. Terracotta pots are preferred for their moisture-wicking properties. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting neli's rhombophyllum — frequently asked questions

How often should you repot neli's rhombophyllum?

Every 2–3 years, into bone-dry mix for neli's rhombophyllum. Repot neli's rhombophyllum every 2–3 years into a snug pot of gritty cactus/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 neli's rhombophyllum need?

When is the best time of year to repot neli's rhombophyllum?

Should you water neli's rhombophyllum after repotting?

No — not straight away. Repot neli's rhombophyllum 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 neli's rhombophyllum after repotting?

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