Cold hardiness & minimum temperature

Is White Bergamot (Monarda clinopodia)cold hardy? Hardiness zone & min temp

Also called White Bergamot, Basil Bee Balm, White Bee Balm.

More about white bergamot

About White Bergamot

Monarda clinopodia · also called White Bergamot, Basil Bee Balm · herb

White Bergamot is a graceful native herb of rich, moist woodland edges in the eastern United States, bearing clusters of creamy-white flowers with subtle pink tones in midsummer. Its aromatic foliage smells distinctly of basil, earning it the name Basil Bee Balm. It attracts bumblebees and hummingbirds and is more mildew-resistant than scarlet bee balm.

Cold limit: USDA 4-9 · RHS H6 (−25 to 35°C)

What white bergamot's hardiness rating actually means

Yes — white bergamot is genuinely cold hardy. Rated RHS H6 and USDA 4-9, 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 4-9 — 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. White Bergamot is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for white bergamot 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 white bergamot go outside or overwinter — and where?

Plant it out within USDA 4-9 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 white bergamot can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

White Bergamot hardiness — frequently asked questions

Is white bergamot cold hardy?

Yes — white bergamot is genuinely cold hardy. Rated RHS H6 and USDA 4-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. White Bergamot is hardy across USDA 4-9; 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 white bergamot can survive?

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

What hardiness zone is white bergamot?

White Bergamot is rated USDA 4-9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can white bergamot survive winter outside?

Plant it out within USDA 4-9 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 white bergamot 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.