Cold hardiness & minimum temperature

Is Caryopteris x clandonensis 'Worcester Gold' (Caryopteris x clandonensis 'Worcester Gold')cold hardy? Hardiness zone & min temp

Also called Worcester Gold bluebeard, gold-leaf blue mist shrub.

More about caryopteris x clandonensis 'worcester gold'

About Caryopteris x clandonensis 'Worcester Gold'

Caryopteris x clandonensis 'Worcester Gold' · also called Worcester Gold bluebeard, gold-leaf blue mist shrub · flowering

'Worcester Gold' is a bluebeard grown for the striking contrast of bright golden-yellow foliage against soft lavender-blue late-summer flowers. It wants full sun to hold the gold colour and sharp drainage to thrive. Drought-tolerant once established, it blooms on new wood, so hard-prune in early spring for the best display.

Cold limit: USDA 5-9 · RHS H5 (-15 to 30°C)

Watch for — Root rot in wet soil: Soggy or clay soils rot the roots, especially over winter. Use raised, gritty, free-draining beds.

What caryopteris x clandonensis 'worcester gold''s hardiness rating actually means

Yes — caryopteris x clandonensis 'worcester gold' is genuinely cold hardy. Rated RHS H5 and USDA 5-9, 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 5-9 — 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 −15 to −10 °C. Caryopteris x clandonensis 'Worcester Gold' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for caryopteris x clandonensis 'worcester gold' 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 caryopteris x clandonensis 'worcester gold' go outside or overwinter — and where?

Plant it out within USDA 5-9 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 caryopteris x clandonensis 'worcester gold' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H5 figure above.

Caryopteris x clandonensis 'Worcester Gold' hardiness — frequently asked questions

Is caryopteris x clandonensis 'worcester gold' cold hardy?

Yes — caryopteris x clandonensis 'worcester gold' is genuinely cold hardy. Rated RHS H5 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Caryopteris x clandonensis 'Worcester Gold' is hardy across USDA 5-9; 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 caryopteris x clandonensis 'worcester gold' can survive?

Minimum survivable temperature is roughly about −15 to −10 °C. Caryopteris x clandonensis 'Worcester Gold' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is caryopteris x clandonensis 'worcester gold'?

Caryopteris x clandonensis 'Worcester Gold' is rated USDA 5-9 and RHS H5 — Hardy in most of the UK and in cold winters.

Can caryopteris x clandonensis 'worcester gold' survive winter outside?

Plant it out within USDA 5-9 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 caryopteris x clandonensis 'worcester gold' 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.