Cold hardiness & minimum temperature

Is Agave parrasana (Agave parrasana)cold hardy? Hardiness zone & min temp

Also called Parras agave, cabbage head agave.

More about agave parrasana

About Agave parrasana

Agave parrasana · also called Parras agave, cabbage head agave · houseplant

Agave parrasana, from the Sierra de Parras in Coahuila, Mexico, is a compact, tightly packed agave often called the cabbage-head agave for its rounded, artichoke-like form. Broad, powdery blue-grey leaves carry striking red-brown teeth and bud imprints, with vivid coral bracts at flowering. Slow, symmetrical and frost-tolerant, it is a prized specimen for pots and rock gardens.

Cold limit: USDA 7b-11 (hardy to roughly -12 to -15°C / 5 to 10°F when dry) · RHS H4 (10-30°C)

What agave parrasana's hardiness rating actually means

Yes — agave parrasana is genuinely cold hardy. Rated RHS H4 and USDA 7b-11 (hardy to roughly -12 to -15°C / 5 to 10°F when dry), it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H4 means: Hardy in an average winter across much of the temperate world. On the US scale that maps to USDA 7b-11 (hardy to roughly -12 to -15°C / 5 to 10°F when dry) — 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 −10 to −5 °C. Agave parrasana is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for agave parrasana as it gets too cold:

It tolerates winter lows to about −10 to −5 °C once established.
Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root.
First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.

Can agave parrasana go outside or overwinter — and where?

Plant it out within USDA 7b-11 (hardy to roughly -12 to -15°C / 5 to 10°F when dry) and it overwinters with little or no help.
It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy.
The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

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 agave parrasana can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Agave parrasana hardiness — frequently asked questions

Is agave parrasana cold hardy?

Yes — agave parrasana is genuinely cold hardy. Rated RHS H4 and USDA 7b-11 (hardy to roughly -12 to -15°C / 5 to 10°F when dry), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Agave parrasana is hardy across USDA 7b-11 (hardy to roughly -12 to -15°C / 5 to 10°F when dry); it belongs in the ground or a frost-proof container, not on a windowsill, and many types actively need a cold winter to perform.

What is the minimum temperature agave parrasana can survive?

Minimum survivable temperature is roughly about −10 to −5 °C. Agave parrasana is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is agave parrasana?

Agave parrasana is rated USDA 7b-11 (hardy to roughly -12 to -15°C / 5 to 10°F when dry) and RHS H4 — Hardy in an average winter across much of the temperate world.

Can agave parrasana survive winter outside?

Plant it out within USDA 7b-11 (hardy to roughly -12 to -15°C / 5 to 10°F when dry) and it overwinters with little or no help. It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy. The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

What happens to agave parrasana below its minimum temperature?

It tolerates winter lows to about −10 to −5 °C once established. Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root. First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.