Cold hardiness & minimum temperature

Is Anemone coronaria 'Mr. Fokker' (Anemone coronaria 'Mr. Fokker')cold hardy? Hardiness zone & min temp

Also called Mr. Fokker anemone, blue poppy anemone, violet anemone.

More about anemone coronaria 'mr. fokker'

About Anemone coronaria 'Mr. Fokker'

Anemone coronaria 'Mr. Fokker' · also called Mr. Fokker anemone, blue poppy anemone · flowering

Mr. Fokker is a classic single poppy anemone from the De Caen group, with rich violet-blue petals encircling a black centre ringed by dark stamens. Grown from soaked corms planted in autumn or late winter, it flowers in spring on slender stems and makes an excellent cut flower. Being a buttercup relative, it is toxic to cats and dogs.

Cold limit: USDA 7-10 (cool-season annual or lifted in colder zones) · RHS H4 (7-18°C)

What anemone coronaria 'mr. fokker''s hardiness rating actually means

Hardiness works differently for anemone coronaria 'mr. fokker': it is grown as a seasonal crop, not overwintered. The question is not "what zone" but "how long is your frost-free growing window". 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 7-10 (cool-season annual or lifted in colder zones) — 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

As an annual crop, its "minimum temperature" is the first hard frost — that is the end of the plant's life, not a survivable low. Many types are also damaged by light frost (around 0 °C).

Concretely, for anemone coronaria 'mr. fokker' as it gets too cold:

Light frost (around 0 to −2 °C) damages or kills tender summer crops outright; cold-hardy types take a few degrees of frost.
The plant does not "survive winter" — its life cycle simply ends, by design, when frost arrives or it finishes cropping.
A surprise late spring frost can also kill young transplants set out too early, before the season even starts.

Can anemone coronaria 'mr. fokker' go outside or overwinter — and where?

Time it to your frost dates: sow or plant out after the last spring frost, and aim to harvest before the first autumn frost.
In short-season zones, start it indoors or under cover to stretch the effective growing window.
Hardier crops in this group can be sown for an autumn or overwintered harvest in mild zones — check the specific crop.

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 anemone coronaria 'mr. fokker' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H4 figure above.

Frost protection for borderline anemone coronaria 'mr. fokker'

Anemone coronaria 'Mr. Fokker' is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

Use fleece, cloches or a cold frame at each end of the season to dodge a borderline frost and add growing weeks.
Have row cover ready for an unexpected late spring or early autumn frost.
Know your local last- and first-frost dates and count back the crop’s days-to-maturity to schedule the sowing.

Anemone coronaria 'Mr. Fokker' hardiness — frequently asked questions

Is anemone coronaria 'mr. fokker' cold hardy?

Hardiness works differently for anemone coronaria 'mr. fokker': it is grown as a seasonal crop, not overwintered. The question is not "what zone" but "how long is your frost-free growing window". A seasonal crop, not a perennial. Anemone coronaria 'Mr. Fokker' is grown 7-10 (cool-season annual or lifted in colder zones); you sow after the last frost and harvest before the first one, then start again next year.

What is the minimum temperature anemone coronaria 'mr. fokker' can survive?

As an annual crop, its "minimum temperature" is the first hard frost — that is the end of the plant's life, not a survivable low. Many types are also damaged by light frost (around 0 °C).

What hardiness zone is anemone coronaria 'mr. fokker'?

Anemone coronaria 'Mr. Fokker' is rated USDA 7-10 (cool-season annual or lifted in colder zones) and RHS H4 — Hardy in an average winter across much of the temperate world.

Can anemone coronaria 'mr. fokker' survive winter outside?

Time it to your frost dates: sow or plant out after the last spring frost, and aim to harvest before the first autumn frost. In short-season zones, start it indoors or under cover to stretch the effective growing window. Hardier crops in this group can be sown for an autumn or overwintered harvest in mild zones — check the specific crop.

How do I protect anemone coronaria 'mr. fokker' from frost?

Use fleece, cloches or a cold frame at each end of the season to dodge a borderline frost and add growing weeks. Have row cover ready for an unexpected late spring or early autumn frost. Know your local last- and first-frost dates and count back the crop’s days-to-maturity to schedule the sowing.