Cold hardiness & minimum temperature

Is Blue Creeping Speedwell (Veronica umbrosa 'Georgia Blue')cold hardy? Hardiness zone & min temp

Also called Blue Creeping Speedwell, Georgia Blue Speedwell.

More about blue creeping speedwell

About Blue Creeping Speedwell

Veronica umbrosa 'Georgia Blue' · also called Blue Creeping Speedwell, Georgia Blue Speedwell · flowering

Blue Creeping Speedwell is a low, spreading semi-evergreen perennial bearing masses of brilliant cobalt-blue flowers with white centres from late winter into spring. Its dark, bronzed foliage remains attractive through winter. A tough, versatile ground cover suited to rock gardens, borders, and between paving stones in temperate gardens.

Cold limit: USDA 5–9 · RHS H7 (-15–25°C)

Watch for — Crown rot in wet winters: Persistently wet, poorly drained soil leads to crown rot. Improve drainage before planting and avoid mulching directly over the crown in wet climates.

What blue creeping speedwell's hardiness rating actually means

Yes — blue creeping speedwell is genuinely cold hardy. Rated RHS H7 and USDA 5–9, 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 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 below about −20 °C. Blue Creeping Speedwell is built for winter — once established it takes hard frost and snow in its stride.

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

Blue Creeping Speedwell hardiness — frequently asked questions

Is blue creeping speedwell cold hardy?

Yes — blue creeping speedwell is genuinely cold hardy. Rated RHS H7 and USDA 5–9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Blue Creeping Speedwell 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 blue creeping speedwell can survive?

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

What hardiness zone is blue creeping speedwell?

Blue Creeping Speedwell is rated USDA 5–9 and RHS H7 — Hardy in the severest European continental winters.

Can blue creeping speedwell 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 blue creeping speedwell 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.