Cold hardiness & minimum temperature

Is Cinnamon Bunny Ears (Opuntia microdasys var. rufida)cold hardy? Hardiness zone & min temp

Also called Red Bunny Ears, Cinnamon Cactus.

More about cinnamon bunny ears

About Cinnamon Bunny Ears

Opuntia microdasys var. rufida · also called Red Bunny Ears, Cinnamon Cactus · houseplant

Cinnamon Bunny Ears is a slow, clump-forming Opuntia prized for flat green pads studded with rusty-brown glochids in neat polka-dot rows. Unlike the type, var. rufida lacks long spines but its barbed glochids detach at a touch. Give it bright direct sun, gritty fast-draining mix, sparse winter water, and warmth; it stays compact and sculptural indoors.

Cold limit: USDA 9-11 (indoor/under glass in most US homes) · RHS H2 (18-29°C)

Watch for — Soft, mushy or blackening pads: Overwatering or poor drainage causes basal rot. Let the mix dry fully between soaks, use gritty soil, and water far less in winter.

What cinnamon bunny ears's hardiness rating actually means

Cinnamon Bunny Ears is half-hardy (RHS H2). It survives a mild winter outdoors in a sheltered spot, but a hard frost kills it — so in colder zones it is lifted, potted, or grown as a tender plant. Its RHS rating of H2 means: Tender — survives a frost-free greenhouse or a very mild, sheltered spot. On the US scale that maps to USDA 9-11 (indoor/under glass in most US homes) — the zones where it can be left outdoors year-round.

New to these scales? The USDA hardiness zone map explained covers how the zone numbers work, and you can find your own zone with the zone finder.

Minimum temperature — and what happens below it

Minimum survivable temperature is roughly about 1 to 5 °C — tolerates cold but no real frost. Cinnamon Bunny Ears shrugs off cold nights but a real, sustained freeze will kill it.

Concretely, for cinnamon bunny ears as it gets too cold:

Down to roughly about 1 to 5 °C it copes, especially if dry and sheltered.
A sustained hard frost collapses the top growth; whether it returns depends on whether the roots, crown or tubers froze.
Wet cold is far more lethal than dry cold for this plant — soggy, frozen soil is the usual killer.

Can cinnamon bunny ears go outside or overwinter — and where?

It can live outside year-round only in the mildest, most sheltered part of USDA 9-11 (indoor/under glass in most US homes) or a frost-free UK microclimate.
In colder zones, grow it in a pot you can move under cover, or lift its tubers/roots and store them frost-free over winter.
A south-facing wall, free-draining soil and a dry winter position can push it a full zone hardier than the books suggest.

Work back from your local frost dates with the frost-date calculator: the last spring frost and first autumn frost are what really decide when cinnamon bunny ears can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H2 figure above.

Frost protection for borderline cinnamon bunny ears

Cinnamon Bunny Ears is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

Mulch the crown or root zone deeply with bark, straw or leaf-mould before the first hard frost.
Move container plants against a warm wall or into an unheated but frost-free porch or greenhouse.
Fleece the top growth on the coldest nights, and keep it on the dry side — dry roots survive cold far better than wet ones.
Lift dahlia-type tubers or tender crowns after the first light frost blackens the foliage and store them somewhere cool but frost-free.

Cinnamon Bunny Ears hardiness — frequently asked questions

Is cinnamon bunny ears cold hardy?

Cinnamon Bunny Ears is half-hardy (RHS H2). It survives a mild winter outdoors in a sheltered spot, but a hard frost kills it — so in colder zones it is lifted, potted, or grown as a tender plant. Borderline outdoors. In its mild end of USDA 9-11 (indoor/under glass in most US homes) (and sheltered UK gardens) cinnamon bunny ears can stay out; in colder areas it must be lifted, brought in, or treated as a frost-tender plant.

What is the minimum temperature cinnamon bunny ears can survive?

Minimum survivable temperature is roughly about 1 to 5 °C — tolerates cold but no real frost. Cinnamon Bunny Ears shrugs off cold nights but a real, sustained freeze will kill it.

What hardiness zone is cinnamon bunny ears?

Cinnamon Bunny Ears is rated USDA 9-11 (indoor/under glass in most US homes) and RHS H2 — Tender — survives a frost-free greenhouse or a very mild, sheltered spot.

Can cinnamon bunny ears survive winter outside?

It can live outside year-round only in the mildest, most sheltered part of USDA 9-11 (indoor/under glass in most US homes) or a frost-free UK microclimate. In colder zones, grow it in a pot you can move under cover, or lift its tubers/roots and store them frost-free over winter. A south-facing wall, free-draining soil and a dry winter position can push it a full zone hardier than the books suggest.

How do I protect cinnamon bunny ears from frost?

Mulch the crown or root zone deeply with bark, straw or leaf-mould before the first hard frost. Move container plants against a warm wall or into an unheated but frost-free porch or greenhouse. Fleece the top growth on the coldest nights, and keep it on the dry side — dry roots survive cold far better than wet ones. Lift dahlia-type tubers or tender crowns after the first light frost blackens the foliage and store them somewhere cool but frost-free.