Cold hardiness & minimum temperature

Is Treneague Chamomile (Chamaemelum nobile 'Treneague')cold hardy? Hardiness zone & min temp

Also called Treneague chamomile, non-flowering chamomile, lawn chamomile.

More about treneague chamomile

About Treneague Chamomile

Chamaemelum nobile 'Treneague' · also called Treneague chamomile, non-flowering chamomile · herb

'Treneague' is a low, non-flowering clone of Roman chamomile grown chiefly for fragrant chamomile lawns and seats. Its dense, apple-scented evergreen mat releases scent when walked on and never needs mowing since it rarely flowers. Spreading by creeping stems, it suits sunny, free-draining sites and is propagated only by division, as it sets no seed.

Cold limit: USDA 4-9 (hardy in temperate gardens) · RHS H5 (-5 to 27°C)

What treneague chamomile's hardiness rating actually means

Yes — treneague chamomile is genuinely cold hardy. Rated RHS H5 and USDA 4-9 (hardy in temperate gardens), it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H5 means: Hardy in most of the UK and in cold winters. On the US scale that maps to USDA 4-9 (hardy in temperate gardens) — 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 −15 to −10 °C. Treneague Chamomile is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for treneague chamomile as it gets too cold:

It tolerates winter lows to about −15 to −10 °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 treneague chamomile go outside or overwinter — and where?

Plant it out within USDA 4-9 (hardy in temperate gardens) 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 treneague chamomile can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Treneague Chamomile hardiness — frequently asked questions

Is treneague chamomile cold hardy?

Yes — treneague chamomile is genuinely cold hardy. Rated RHS H5 and USDA 4-9 (hardy in temperate gardens), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Treneague Chamomile is hardy across USDA 4-9 (hardy in temperate gardens); 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 treneague chamomile can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Treneague Chamomile is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is treneague chamomile?

Treneague Chamomile is rated USDA 4-9 (hardy in temperate gardens) and RHS H5 — Hardy in most of the UK and in cold winters.

Can treneague chamomile survive winter outside?

Plant it out within USDA 4-9 (hardy in temperate gardens) 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 treneague chamomile below its minimum temperature?

It tolerates winter lows to about −15 to −10 °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.