Mirai
Zea mays 'Mirai'
A revolutionary yellow sweet corn hybrid that represents the cutting edge of corn breeding, combining incredible tenderness with sweetness that intensifies rather than diminishes after harvest. Mirai produces beautiful golden ears with exceptional kernel quality and extended harvest window, staying tender and sweet longer than traditional varieties. This Japanese-developed variety has quickly gained popularity among discerning gardeners who want the absolute best in sweet corn technology and flavor.
Harvest
82-85d
Days to harvest
Sun
Full sun
Zones
2–11
USDA hardiness
Height
5-8 feet
Planting Timeline
Showing dates for Mirai in USDA Zone 7
All Zone 7 corn →Zone Map
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Mirai · Zones 2–11
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 3 | — | — | June – July | September – October |
| Zone 4 | — | — | June – July | September – October |
| Zone 5 | — | — | May – June | September – October |
| Zone 6 | — | — | May – June | August – October |
| Zone 7 | — | — | April – June | August – September |
| Zone 8 | — | — | April – May | July – September |
| Zone 9 | — | — | March – April | June – August |
| Zone 10 | — | — | February – April | June – July |
Complete Growing Guide
Light: Full sun (6 or more hours of direct sunlight a day). Soil: Clay, High Organic Matter, Loam (Silt). Soil pH: Acid (<6.0), Neutral (6.0-8.0). Drainage: Good Drainage. Height: 5 ft. 0 in. - 8 ft. 0 in.. Spread: 1 ft. 0 in. - 2 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Rapid. Maintenance: Medium. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.
Harvesting
Color: Gold/Yellow. Type: Caryopsis. Length: > 3 inches. Width: 1-3 inches.
Garden value: Edible, Showy
Harvest time: Fall
Bloom time: Summer
Edibility: Edibile
Storage & Preservation
Store freshly harvested Mirai corn in the refrigerator immediately, keeping husks on to maintain moisture and sweetness. Unlike traditional sweet corn that loses sugar rapidly, Mirai's advanced genetics maintain sweetness for 7-10 days when properly stored at 32-35°F with high humidity.
For freezing, blanch husked ears in boiling water for 4-6 minutes depending on size, then plunge into ice water before cutting kernels from cob. Mirai's tender kernels freeze exceptionally well, maintaining their creamy texture for up to 12 months.
Whole ears can be frozen directly in husks after removing outer leaves—this method preserves Mirai's signature tenderness better than blanching. For canning, use only tested pressure canning recipes due to corn's low acidity. Mirai's natural sweetness intensifies during the canning process, making it ideal for preserving. The variety's exceptional kernel quality also makes it excellent for dehydrating into corn flour or meal.
History & Origin
Origin: Mexico
Advantages
- +Disease resistance: Black Walnut
- +Edible: Edibile
- +Fast-growing
Companion Plants
Plant Together
Beans
Fix nitrogen in soil that corn heavily uses, part of Three Sisters planting method
Squash
Large leaves provide ground cover, suppress weeds, and retain soil moisture
Marigolds
Repel corn earworms, aphids, and other harmful insects with natural compounds
Nasturtiums
Act as trap crops for aphids and cucumber beetles, attracting them away from corn
Sunflowers
Attract beneficial insects and can serve as natural trellises for climbing beans
Dill
Attracts beneficial insects like ladybugs and parasitic wasps that control corn pests
Cucumbers
Benefit from corn's tall structure for partial shade and wind protection
Sweet Alyssum
Attracts beneficial insects and provides ground cover without competing for nutrients
Keep Apart
Tomatoes
Both are heavy feeders competing for nutrients, and corn earworms also attack tomatoes
Brassicas
Corn can stunt growth of cabbage family plants through allelopathic effects
Black Walnut
Releases juglone toxin that severely inhibits corn growth and development
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #168538)
Pests & Disease Resistance
Resistance
Excellent resistance to northern corn leaf blight and rust diseases
Common Pests
Corn earworm, European corn borer, corn rootworm, birds
Diseases
Stewart's wilt, gray leaf spot, southern corn leaf blight