Cold hardiness & minimum temperature

Is Cape Gold Everlasting (Helichrysum splendidum)cold hardy? Hardiness zone & min temp

Also called Cape Gold Everlasting, Cape Gold, Three-lined Everlasting.

More about cape gold everlasting

About Cape Gold Everlasting

Helichrysum splendidum · also called Cape Gold Everlasting, Cape Gold · flowering

Helichrysum splendidum is a bushy, rounded, evergreen shrub native to rocky fynbos, grassland, and mountain savanna habitats along the eastern escarpment of Africa, from the Southern Cape of South Africa north to Ethiopia and Yemen. It is grown for its intensely silvery-grey, woolly foliage and bright golden-yellow, button-like everlasting flowerheads produced in late summer and autumn. Excellent drainage and full sun are the non-negotiable requirements; it is susceptible to root rot in heavy, wet soils. Helichrysum splendidum is not listed by the ASPCA; classified here as mildly-toxic on precautionary grounds.

Cold limit: USDA 6–10 · RHS H4 (-10 °C to 35 °C)

What cape gold everlasting's hardiness rating actually means

Yes — cape gold everlasting is genuinely cold hardy. Rated RHS H4 and USDA 6–10, 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 6–10 — 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 −10 to −5 °C. Cape Gold Everlasting is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for cape gold everlasting 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 cape gold everlasting go outside or overwinter — and where?

Plant it out within USDA 6–10 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 cape gold everlasting can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Cape Gold Everlasting hardiness — frequently asked questions

Is cape gold everlasting cold hardy?

Yes — cape gold everlasting is genuinely cold hardy. Rated RHS H4 and USDA 6–10, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Cape Gold Everlasting is hardy across USDA 6–10; 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 cape gold everlasting can survive?

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

What hardiness zone is cape gold everlasting?

Cape Gold Everlasting is rated USDA 6–10 and RHS H4 — Hardy in an average winter across much of the temperate world.

Can cape gold everlasting survive winter outside?

Plant it out within USDA 6–10 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 cape gold everlasting 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.