Repotting guide

When & how to repot Euphorbia bubalina (Euphorbia bubalina)

Also called buffalo euphorbia, greater buffalo euphorbia.

More about euphorbia bubalina

About Euphorbia bubalina

Euphorbia bubalina · also called buffalo euphorbia, greater buffalo euphorbia · houseplant

Euphorbia bubalina is a spineless, shrubby succulent from South Africa's Eastern Cape with a fat green trunk, ribbed branches and flushes of bright leaves and lime-yellow flowers in spring. Unusually leafy for a euphorbia, it likes bright light, gritty soil and moderate water in growth. It makes a handsome, fast-establishing architectural pot plant.

Mature size: Grows to about 0.5-1 m tall and wide in cultivation, forming a stout, branching shrub; moderate to fairly quick for the genus.

How to tell euphorbia bubalina needs repotting

Repotting on a calendar is less reliable than reading the plant. For euphorbia bubalina, 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 euphorbia bubalina

Every 2–3 years, into bone-dry mix. Euphorbia bubalina's growth habit — spineless succulent shrub with a thick green basal trunk and ribbed, upright branches bearing strappy leaves at the tips and clusters of yellow-green flowers; bushy and architectural. — sets the pace. Euphorbia bubalina is a spineless, shrubby succulent from South Africa's Eastern Cape with a fat green trunk, ribbed branches and flushes of bright leaves and lime-yellow flowers in spring. Unusually leafy for a euphorbia, it likes bright light, gritty soil and moderate water in growth. It makes a handsome, fast-establishing architectural pot plant.

What size pot to step euphorbia bubalina up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Euphorbia bubalina 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 euphorbia bubalina

Spring or summer, while euphorbia bubalina 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 euphorbia bubalina

Repot dry. Do not water euphorbia bubalina 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 free-draining gritty 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 euphorbia bubalina 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 euphorbia bubalina 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 euphorbia bubalina

Euphorbia bubalina wants free-draining gritty succulent mix. Use cactus compost amended with pumice, perlite or grit for sharp drainage. A stable, slightly weighted pot supports the swollen base; ensure the container drains freely. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting euphorbia bubalina — frequently asked questions

How often should you repot euphorbia bubalina?

Every 2–3 years, into bone-dry mix for euphorbia bubalina. Repot euphorbia bubalina every 2–3 years into a snug pot of free-draining gritty 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 euphorbia bubalina need?

When is the best time of year to repot euphorbia bubalina?

Should you water euphorbia bubalina after repotting?

No — not straight away. Repot euphorbia bubalina 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 euphorbia bubalina after repotting?

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