Cold hardiness & minimum temperature

Is Bloody Butcher Corn (Zea mays 'Bloody Butcher')cold hardy? Hardiness zone & min temp

Also called Bloody Butcher corn, red heirloom corn, Native American corn.

More about bloody butcher corn

About Bloody Butcher Corn

Zea mays 'Bloody Butcher' · also called Bloody Butcher corn, red heirloom corn · edible

Bloody Butcher is a tall heirloom dent corn with deep blood-red kernels, grown for cornmeal, roasting ears and ornamental ears. Plants reach 3 m and bear two or more ears each. As a wind-pollinated grass it must be sown in blocks, in full sun, on fertile soil after the soil has warmed.

Cold limit: USDA Grown as a warm-season annual in all zones; needs a long frost-free season (~110-120 days) · RHS H2 (16-32°C)

What bloody butcher corn's hardiness rating actually means

Hardiness works differently for bloody butcher corn: 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 H2 means: Tender — survives a frost-free greenhouse or a very mild, sheltered spot. On the US scale that maps to USDA Grown as a warm-season annual in all zones; needs a long frost-free season (~110-120 days) — 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 bloody butcher corn 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 bloody butcher corn 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 bloody butcher corn can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H2 figure above.

Frost protection for borderline bloody butcher corn

Bloody Butcher Corn 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.

Bloody Butcher Corn hardiness — frequently asked questions

Is bloody butcher corn cold hardy?

Hardiness works differently for bloody butcher corn: 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. Bloody Butcher Corn is grown Grown as a warm-season annual in all zones; needs a long frost-free season (~110-120 days); you sow after the last frost and harvest before the first one, then start again next year.

What is the minimum temperature bloody butcher corn 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 bloody butcher corn?

Bloody Butcher Corn is rated USDA Grown as a warm-season annual in all zones; needs a long frost-free season (~110-120 days) and RHS H2 — Tender — survives a frost-free greenhouse or a very mild, sheltered spot.

Can bloody butcher corn 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 bloody butcher corn 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.