Repotting guide

When & how to repot Bunny Ear Cactus (Opuntia microdasys)

Also called Polka-Dot Cactus, Angel Wings Cactus, Prickly Pear (closely related).

More about bunny ear cactus

About Bunny Ear Cactus

Opuntia microdasys · also called Polka-Dot Cactus, Angel Wings Cactus · houseplant

Opuntia microdasys is a popular pad-forming Mexican cactus instantly recognisable by its flat, rounded pads covered in neat clusters of tiny golden or white glochids arranged in polka-dot patterns. It is low-maintenance and fast-growing in full sun. Caution: the microscopic glochids are highly irritating to skin and eyes, and the ASPCA lists Opuntia as toxic to pets.

Mature size: 60-90 cm tall and 60 cm wide in containers; larger in open ground

Watch for — Root and basal rot: Overwatering, especially in winter, is the main killer. Keep dry from October to March and ensure excellent drainage.

How to tell bunny ear cactus needs repotting

Repotting on a calendar is less reliable than reading the plant. For bunny ear cactus, 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 bunny ear cactus

Every 2–3 years, into bone-dry mix. Bunny Ear Cactus's growth habit — spreading, segmented pad-forming shrubby cactus — sets the pace. Opuntia microdasys is a popular pad-forming Mexican cactus instantly recognisable by its flat, rounded pads covered in neat clusters of tiny golden or white glochids arranged in polka-dot patterns. It is low-maintenance and fast-growing in full sun. Caution: the microscopic glochids are highly irritating to skin and eyes, and the ASPCA lists Opuntia as toxic to pets.

What size pot to step bunny ear cactus up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Bunny Ear Cactus 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 bunny ear cactus

Spring or summer, while bunny ear cactus 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 bunny ear cactus

Repot dry. Do not water bunny ear cactus 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, very free-draining cactus or succulent mix (50% inorganic) 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 bunny ear cactus 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 bunny ear cactus 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 bunny ear cactus

Bunny Ear Cactus wants gritty, very free-draining cactus or succulent mix (50% inorganic). A 50:50 blend of commercial cactus compost and coarse perlite or horticultural grit matches the rocky, arid soils of its native Mexico. Excellent drainage is essential; shallow terracotta pots are preferred over deep plastic ones. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting bunny ear cactus — frequently asked questions

How often should you repot bunny ear cactus?

Every 2–3 years, into bone-dry mix for bunny ear cactus. Repot bunny ear cactus every 2–3 years into a snug pot of gritty, very free-draining cactus or succulent mix (50% inorganic), 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 bunny ear cactus need?

When is the best time of year to repot bunny ear cactus?

Should you water bunny ear cactus after repotting?

No — not straight away. Repot bunny ear cactus 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 bunny ear cactus after repotting?

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