Cold hardiness & minimum temperature

Is Bouquet Dill (Anethum graveolens 'Bouquet')cold hardy? Hardiness zone & min temp

Also called Bouquet Dill, Common Dill.

More about bouquet dill

About Bouquet Dill

Anethum graveolens 'Bouquet' · also called Bouquet Dill, Common Dill · herb

A classic, full-sized open-pollinated dill cultivar prized for its large, flat-topped umbels of tiny yellow flowers and abundant seed production. Reaches 60–90 cm tall with fine, blue-green feathery foliage. Excellent for pickling, dried seed harvest, and cut flowers. Bolts readily in heat, which is desirable for seed and floral use.

Cold limit: USDA 2-11 (annual) · RHS H4 (10–27°C)

What bouquet dill's hardiness rating actually means

Yes — bouquet dill is genuinely cold hardy. Rated RHS H4 and USDA 2-11 (annual), it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H4 means: Hardy in an average winter across much of the temperate world. On the US scale that maps to USDA 2-11 (annual) — 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 −10 to −5 °C. Bouquet Dill is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for bouquet dill as it gets too cold:

It tolerates winter lows to about −10 to −5 °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 bouquet dill go outside or overwinter — and where?

Plant it out within USDA 2-11 (annual) 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 bouquet dill can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Bouquet Dill hardiness — frequently asked questions

Is bouquet dill cold hardy?

Yes — bouquet dill is genuinely cold hardy. Rated RHS H4 and USDA 2-11 (annual), it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Bouquet Dill is hardy across USDA 2-11 (annual); 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 bouquet dill can survive?

Minimum survivable temperature is roughly about −10 to −5 °C. Bouquet Dill is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is bouquet dill?

Bouquet Dill is rated USDA 2-11 (annual) and RHS H4 — Hardy in an average winter across much of the temperate world.

Can bouquet dill survive winter outside?

Plant it out within USDA 2-11 (annual) 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 bouquet dill below its minimum temperature?

It tolerates winter lows to about −10 to −5 °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.