Cold hardiness & minimum temperature

Is Achillea 'Terracotta' (Achillea 'Terracotta')cold hardy? Hardiness zone & min temp

Also called Terracotta yarrow.

More about achillea 'terracotta'

About Achillea 'Terracotta'

Achillea 'Terracotta' · also called Terracotta yarrow · flowering

Achillea 'Terracotta' is a hardy, sun-loving border yarrow prized for flat clusters of warm orange-to-buff flowers that fade through peach and cream over feathery grey-green foliage. It thrives in poor, sharply drained soil, shrugs off drought once established, and draws bees and butterflies through summer. Cut back hard after flowering to keep it tidy.

Cold limit: USDA 3-8 · RHS H7 (-30 to 30°C)

Watch for — Crown rot in wet soil: Heavy, waterlogged ground rots the crown over winter. Plant in sharply drained soil, add grit to clay, and keep mulch off the crown.

What achillea 'terracotta''s hardiness rating actually means

Yes — achillea 'terracotta' is genuinely cold hardy. Rated RHS H7 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H7 means: Hardy in the severest European continental winters. On the US scale that maps to USDA 3-8 — 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 below about −20 °C. Achillea 'Terracotta' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for achillea 'terracotta' as it gets too cold:

It tolerates winter lows to about −20 °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 achillea 'terracotta' go outside or overwinter — and where?

Plant it out within USDA 3-8 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 achillea 'terracotta' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Achillea 'Terracotta' hardiness — frequently asked questions

Is achillea 'terracotta' cold hardy?

Yes — achillea 'terracotta' is genuinely cold hardy. Rated RHS H7 and USDA 3-8, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Achillea 'Terracotta' is hardy across USDA 3-8; 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 achillea 'terracotta' can survive?

Minimum survivable temperature is roughly below about −20 °C. Achillea 'Terracotta' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is achillea 'terracotta'?

Achillea 'Terracotta' is rated USDA 3-8 and RHS H7 — Hardy in the severest European continental winters.

Can achillea 'terracotta' survive winter outside?

Plant it out within USDA 3-8 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 achillea 'terracotta' below its minimum temperature?

It tolerates winter lows to about −20 °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.