Robust Pop R400mr is an open-pollinated popcorn variety that reaches 72 to 84 inches tall and matures in 95 to 100 days, delivering the reliable performance its name promises. This corn thrives in full sun and rewards gardeners with the satisfying snap of homegrown popcorn kernels, ready to harvest by late summer or early fall depending on your planting date. Direct sown after the soil warms to at least 60°F, it produces sturdy plants that stand up to garden conditions without the genetic complexity of hybrids.
Full Sun
Moderate
3-10
84in H x ?in W
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Moderate
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Open-pollinated popcorn varieties like Robust Pop R400mr offer gardeners the freedom to save seed from year to year, making them economical choices for anyone planning to grow popcorn long-term. The relatively tall stature of 72 to 84 inches commands attention in the garden, while the 95 to 100-day maturity window fits well into most growing seasons. Direct sowing into warm soil produces the best results, avoiding the transplant shock that sensitive corn roots struggle with.
Robust Pop R400mr is grown specifically for popcorn production. The dry kernels are popped for snacking, a centuries-old preparation that transforms individual grains into a light, crispy treat. Home gardeners grow this variety to experience the full cycle from seed to harvest to kitchen, creating fresh popcorn with the flavor and quality that commercial varieties rarely match.
No timeline data available yet for this variety.
Sow seeds 1 to 1.5 inches deep directly into garden soil 1 to 2 weeks after your average last frost date, when soil temperature is at least 60°F. Botanical Interests recommends waiting until soil reaches 65°F to 90°F for ideal results. Germination typically occurs within 7 to 10 days at these temperatures.
Robust Pop R400mr is ready to harvest 95 to 100 days after planting, when ears are fully mature and kernels have hardened completely. Check harvest readiness by peeling back the husk and pressing a kernel with your thumbnail; it should be impossible to dent. Leave ears on the plant as long as possible to allow kernels to dry thoroughly before picking. Harvest by snapping ears from the stalk once husks have turned brown and papery. Allow harvested ears to cure further in a warm, dry location for 2 to 3 weeks before shelling kernels for storage or popping.
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