Signature XR Corn is an early-midseason bicolor hybrid that matures in just 72 days, delivering sweet corn with excellent eating quality when you need it fast. This sh2 (super sweet) variety pairs the refined flavor of extensively crossed super sweet genetics with conventional breeding for dependable performance in home gardens. The bicolor kernels, a classic blend of yellow and white on each cob, signal the variety's balanced sweetness and tender texture. At 72 days from planting to harvest, it fits neatly into shorter growing seasons while maintaining the sugar-rich character that makes fresh corn so craveable.
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Early maturity combined with genuinely excellent eating quality sets this hybrid apart in the crowded field of sweet corn. The sh2 genetics deliver the intense sweetness serious corn lovers crave, while the bicolor kernel pattern promises visual appeal at the dinner table. Johnny's Selected Seeds bred this variety through extensive crossing of super sweet lines, and it delivers on that promise with kernels that stay tender and flavorful longer than many standard varieties.
Signature XR Corn is grown for fresh eating straight off the cob, the primary use for sweet corn varieties. The bicolor kernels and tender texture make it excellent for boiling, grilling, or steaming when ears are at peak ripeness. Home gardeners and farmers growing for farmers markets value it for its visual appeal and the sweet, satisfying bite that defines quality fresh corn.
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Direct sow Signature XR Corn into warm soil after all danger of frost has passed and soil temperature reaches at least 60 degrees Fahrenheit. Sow seeds 1 inch deep, spaced 8 to 10 inches apart in rows 30 inches apart. In cooler regions, wait until soil warms to 70 degrees Fahrenheit or higher for faster, more reliable germination.
Signature XR Corn is ready to eat 18 to 24 days after the silks first appear on the ear, with warmer temperatures speeding maturity. Check for harvest readiness by looking for kernels that are full and have a milky appearance when you puncture them with a fingernail; the silks should be drying and browning at the tip. Ears are at their sweetest at this precise moment, before kernels begin to dent or harden. Harvest by grasping the ear firmly and twisting it downward away from the stalk, or use a sharp knife to cut the ear cleanly. Pick in early morning when kernels are still cool and plump with moisture, and use or preserve the corn within a few hours for peak sweetness and tenderness.
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“Signature XR Corn is a modern hybrid developed through deliberate crossing of super sweet (sh2) corn varieties with conventional genetics. Johnny's Selected Seeds engineered this variety to balance the exceptional sweetness of super sweet strains with the stability and reliability breeders value in commercial and home garden hybrids. The sh2 classification itself represents a significant breeding achievement, the result of decades of work to preserve mutations that dramatically increase sugar content and slow the conversion of sugar to starch after harvest.”