Cold hardiness & minimum temperature

Is Field Bindweed (Convolvulus arvensis)cold hardy? Hardiness zone & min temp

Also called Field Bindweed, Creeping Jenny, Cornbind, Wild Morning Glory.

More about field bindweed

About Field Bindweed

Convolvulus arvensis · also called Field Bindweed, Creeping Jenny · flowering

Field Bindweed is a vigorous, deep-rooted perennial vine native to Europe and Asia, naturalised worldwide as a persistent arable and garden weed. It spreads via an extensive network of fleshy white rhizomes that can penetrate to 2 m depth, making eradication notoriously difficult. Small, funnel-shaped flowers in white to pale pink appear from June to September and are attractive to bees and hoverflies. The sap and plant material are toxic to cats and dogs.

Cold limit: USDA 3-10 · RHS H7 (-20 to 35 °C)

What field bindweed's hardiness rating actually means

Yes — field bindweed is genuinely cold hardy. Rated RHS H7 and USDA 3-10, 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 3-10 — 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. Field Bindweed is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for field bindweed 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 field bindweed go outside or overwinter — and where?

Plant it out within USDA 3-10 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 field bindweed can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H7 figure above.

Field Bindweed hardiness — frequently asked questions

Is field bindweed cold hardy?

Yes — field bindweed is genuinely cold hardy. Rated RHS H7 and USDA 3-10, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Field Bindweed is hardy across USDA 3-10; 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 field bindweed can survive?

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

What hardiness zone is field bindweed?

Field Bindweed is rated USDA 3-10 and RHS H7 — Hardy in the severest European continental winters.

Can field bindweed survive winter outside?

Plant it out within USDA 3-10 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 field bindweed 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.