Cold hardiness & minimum temperature

Is Texas Sage (Salvia coccinea)cold hardy? Hardiness zone & min temp

Also called Texas sage, Scarlet sage, Blood sage, Tropical sage.

More about texas sage

About Texas Sage

Salvia coccinea · also called Texas sage, Scarlet sage · flowering

Salvia coccinea is a bushy, heat-loving perennial or annual native to southeastern North America, Central America, and northern South America, bearing slender spikes of vivid scarlet (and in cultivars also white and pink) tubular flowers from early summer through to the first frost. A favourite of hummingbirds and butterflies, it self-seeds prolifically in warm gardens. In USDA zones 8–10 it overwinters as a perennial; north of that it is grown as a summer annual. The ASPCA lists Salvia coccinea (scarlet sage) as non-toxic to cats and dogs.

Cold limit: USDA 8–10 · RHS H1c (10–35°C)

What texas sage's hardiness rating actually means

Texas Sage is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Its RHS rating of H1c means: Warm-temperate — can summer outdoors but must come in well before the first frost. On the US scale that maps to USDA 8–10 — 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 5 °C (and never frost). Texas Sage has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

Concretely, for texas sage as it gets too cold:

Below about about 5 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches.
A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover.
Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.

Can texas sage go outside or overwinter — and where?

It can holiday outdoors in summer once nights are reliably above 5 °C, in shade or dappled light, hardened off gradually.
Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C.
It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

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 texas sage can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1c figure above.

Texas Sage hardiness — frequently asked questions

Is texas sage cold hardy?

Texas Sage is not cold hardy. It is a tropical houseplant that dies if it is left out through frost — there is no zone where it overwinters outdoors in a UK or cold-US climate. Indoor-only in almost every home. Texas Sage can only live outside year-round in genuinely frost-free climates (roughly USDA 8–10); everywhere else it is a houseplant that summers out at most.

What is the minimum temperature texas sage can survive?

Minimum survivable temperature is roughly about 5 °C (and never frost). Texas Sage has no frost tolerance at all — it is an indoor plant in any climate with a real winter.

What hardiness zone is texas sage?

Texas Sage is rated USDA 8–10 and RHS H1c — Warm-temperate — can summer outdoors but must come in well before the first frost.

Can texas sage survive winter outside?

It can holiday outdoors in summer once nights are reliably above 5 °C, in shade or dappled light, hardened off gradually. Bring it back indoors well before the first autumn frost — do not wait for a frost warning, move it when nights drop toward 10-12 °C. It will never overwinter outside in a temperate climate; the indoors is its winter home, full stop.

What happens to texas sage below its minimum temperature?

Below about about 5 °C, growth stalls and the leaves start to show cold stress — dark, water-soaked, or yellowing patches. A single light frost blackens the foliage; a hard freeze kills the whole plant, roots included, and it does not recover. Even a cold, draughty windowsill or an unheated porch in winter can be enough to damage it permanently.