Blue Hopi

Family: Poaceae Grain Vegetable

Planting Schedule

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Sink your teeth into Blue Hopi’s richly nutty, floury kernels—an alluring blend of cool blue tones and warm, earthy sweetness that feels velvety in the bowl.

At maturity, the cobs develop a dense, medium-to-large ear with a satisfying, tender bite that grinds beautifully into fine flour for everyday baking and thickening. Grow this heritage flour corn for a striking harvest and a distinctive, storied flavor that turns simple meals into something memorable.

Light: Full SunMaturity: 85 DaysHabit: Upright

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Blue Hopi Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	Direct Sow	May 25th	Aug 18th – Aug 29th
Zone 2b	Direct Sow	May 15th	Aug 8th – Aug 25th
Zone 3a	Direct Sow	May 15th	Aug 8th – Sep 1st
Zone 3b	Direct Sow	May 19th	Aug 12th – Sep 21st
Zone 4a	Direct Sow	May 15th	Aug 8th – Sep 24th
Zone 4b	Direct Sow	May 13th	Aug 6th – Sep 27th
Zone 5a	Direct Sow	May 8th	Aug 1st – Sep 30th
Zone 5b	Direct Sow	May 4th	Jul 28th – Oct 5th
Zone 6a	Direct Sow	May 1st	Jul 25th – Oct 10th
Zone 6b	Direct Sow	Apr 25th	Jul 19th – Oct 16th
Zone 7a	Direct Sow	Apr 20th	Jul 14th – Oct 20th
Zone 7b	Direct Sow	Apr 10th	Jul 4th – Oct 28th
Zone 8a	Direct Sow	Apr 1st	Jun 25th – Nov 5th
Zone 8b	Direct Sow	Mar 23rd	Jun 16th – Nov 12th
Zone 9a	Direct Sow	Mar 6th	May 30th – Nov 26th
Zone 9b	Direct Sow	Feb 9th	May 5th – Dec 9th
Zone 10a	—	Oct 1st	Dec 25th – Feb 28th
Zone 10b	—	Oct 1st	Dec 25th – Feb 28th
Zone 11a	—	Oct 1st	Dec 25th – Feb 28th
Zone 11b	—	Oct 1st	Dec 25th – Feb 28th
Zone 12a	—	Oct 1st	Dec 25th – Feb 28th
Zone 12b	—	Oct 1st	Dec 25th – Feb 28th
Zone 13a	—	Oct 1st	Dec 25th – Feb 28th
Zone 13b	—	Oct 1st	Dec 25th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	85
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	60
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Blue Hopi leans nutty and earthy rather than candy-sweet, and its kernels grind into flour that goes smooth and velvety in batter and porridges. Use it when you want corn flavor to read toasted and grounded—especially in thickened soups or griddled breads where the flour’s texture really shows.

Best Uses

baking with Blue Hopi flour—corn muffins, hoecakes, and griddled quick breads
thickening chowders and sauces (no grit when well-ground)
creamy polenta-style porridges made from the flour
roasting/boiling fresh cobs for a nutty, less-sugary sweet corn experience

Flavor Profile

cool, nutty sweetness earthy, toasted corn flavor velvety floury mouthfeel with a tender bite grinds to a silky, fine grind

Kitchen Pairings

butter smoked pork black pepper cheddar cilantro chili powder

Frequently Asked Questions

Why are my Blue Hopi plants getting powdery white patches on the leaves, and what should I do?

Powdery mildew is common on squashes like Blue Hopi, showing up as a white, floury film on older leaves in warm, humid stretches. Remove the worst affected leaves early, improve airflow (thin crowded foliage and keep leaves off the soil), and spray a labeled sulfur-based fungicide or potassium bicarbonate as soon as spots appear, repeating per label intervals. Avoid overhead watering so the canopy dries quickly between morning and midday.

How often should I water Blue Hopi during the main growing phase (once it’s established)?

During flowering and fruit set, keep the soil evenly moist but not waterlogged—about 1 inch (2.5 cm) per week total, adjusted for heat and rainfall. Water deeply 1–2 times per week rather than daily, aiming water at the soil under the canopy; the top 1 inch should dry slightly between waterings. If leaves wilt at midday but perk up by evening, increase watering frequency slightly without soaking the roots.

How can I tell when Blue Hopi is ready to harvest?

Harvest when the pods develop into mature, hard, “dry” blue kernels inside the husk—around 85 days from sowing—when the plant’s foliage starts to yellow and dry. The easiest check is the seed: kernels should be firm and fully colored (not soft or dentable with a fingernail). Leave pods on the plant a bit longer if needed for the kernels to harden, then cure by drying in a warm, airy spot before storing.