Cold hardiness & minimum temperature

Is Liatris spicata 'Kobold' (Liatris spicata 'Kobold')cold hardy? Hardiness zone & min temp

Also called Kobold blazing star.

More about liatris spicata 'kobold'

About Liatris spicata 'Kobold'

Liatris spicata 'Kobold' · also called Kobold blazing star · flowering

A compact, dwarf selection of dense blazing star bearing the same fluffy rosy-purple bottlebrush spikes in mid to late summer on shorter, sturdier, less floppy stems. 'Kobold' (meaning 'goblin') suits smaller borders and containers while keeping all the pollinator appeal, drawing bees and butterflies. Grown from corms, it is hardy, drought-tolerant, and a fine compact cut flower.

Cold limit: USDA 3-9 · RHS H6 (-34 to 32°C)

Watch for — Corm rot in wet soil: Cold, waterlogged winter ground rots the corms; sharp drainage is the key to survival.

What liatris spicata 'kobold''s hardiness rating actually means

Yes — liatris spicata 'kobold' is genuinely cold hardy. Rated RHS H6 and USDA 3-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H6 means: Hardy throughout the UK and northern Europe. On the US scale that maps to USDA 3-9 — 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 −20 to −15 °C. Liatris spicata 'Kobold' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for liatris spicata 'kobold' as it gets too cold:

It tolerates winter lows to about −20 to −15 °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 liatris spicata 'kobold' go outside or overwinter — and where?

Plant it out within USDA 3-9 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 liatris spicata 'kobold' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Liatris spicata 'Kobold' hardiness — frequently asked questions

Is liatris spicata 'kobold' cold hardy?

Yes — liatris spicata 'kobold' is genuinely cold hardy. Rated RHS H6 and USDA 3-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Liatris spicata 'Kobold' is hardy across USDA 3-9; 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 liatris spicata 'kobold' can survive?

Minimum survivable temperature is roughly about −20 to −15 °C. Liatris spicata 'Kobold' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is liatris spicata 'kobold'?

Liatris spicata 'Kobold' is rated USDA 3-9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can liatris spicata 'kobold' survive winter outside?

Plant it out within USDA 3-9 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 liatris spicata 'kobold' below its minimum temperature?

It tolerates winter lows to about −20 to −15 °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.