Cold hardiness & minimum temperature

Is White Prairie Clover (Dalea candida)cold hardy? Hardiness zone & min temp

Also called white prairie clover, white tassels.

More about white prairie clover

About White Prairie Clover

Dalea candida · also called white prairie clover, white tassels · flowering

White prairie clover is a deep-rooted prairie legume of central North America, bearing wiry stems tipped with cone-shaped spikes of small white flowers from early to midsummer. Like its purple cousin it fixes nitrogen, withstands drought, and feeds a wide range of bees and butterflies, lending fine texture and clean colour to sunny meadows and dry, lean borders.

Cold limit: USDA 3-8 · RHS H7 (-40 to 35°C)

What white prairie clover's hardiness rating actually means

Yes — white prairie clover 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. White Prairie Clover is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for white prairie clover 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 white prairie clover 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 white prairie clover can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

White Prairie Clover hardiness — frequently asked questions

Is white prairie clover cold hardy?

Yes — white prairie clover 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. White Prairie Clover 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 white prairie clover can survive?

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

What hardiness zone is white prairie clover?

White Prairie Clover is rated USDA 3-8 and RHS H7 — Hardy in the severest European continental winters.

Can white prairie clover 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 white prairie clover 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.