Oklahoma native Carl Barnes selected the stunning Glass Gem from several traditional heirlooms known for their beauty. Words don’t do justice to the multicoloured, translucent, gem-like kernels on these amazing cobs.
The plants are sturdy and grow 6-8′ tall, with several 18-20cm long ears. The kernels can be popped or ground into flour, but they’re almost too beautiful to part with. Consider starting this one indoors, as it has a long maturation. The kernels take on these extraordinary colours as they dry so they make exceptional autumn displays. No two cobs are identical.
How To Grow, Timing: Direct sow in late spring. If the soil is not warm enough, seeds often rot before sprouting – especially when not treated with fungicide. Untreated corn seeds should be planted only when the soil has warmed up above 18°C – warmer for super-sweet (sh2) types, and even warmer for a good stand. Use a soil thermometer. If spring weather is cold, consider planting in flats or individual pots, indoors with bottom heat, for transplanting. Seeds should germinate in 7-10 days. If it rains after planting and corn does not emerge, just re-plant the area.
How To Grow, Starting: Do not soak corn seeds prior to planting. Plant 2-5cm deep (shallower for sh2 seed or in cool soil). Sow seeds around 7.5cm apart, in rows 60-90cm apart.
Because corn is wind pollinated, plant in a dense block of at least 4 rows, rather than in single rows. This increases the chance of corn pollen, which emerges from male flowers at the growing tip, to fall down onto the receptive female silks that extend from each corn cob.
How To Grow, Growing: Ideal pH: 5.8-6.8. Corn is a heavy feeder, so add manure or compost, and use 500g of complete organic fertilizer per 6m of row, mixing it thoroughly into the soil beneath each seed furrow. Thin to at least 20-25cm apart in the row. Large eared and double-eared varieties need to be 30cm apart. Keep free of weeds until knee-high, and then leave it alone.
How To Grow, Harvest: When the silks at the end of an ear are a dry brown, the cob seems to start to droop, and the kernels release milky juice when cut.
How To Grow, Harvesting Popcorn: Leave the ears of popcorn varieties on the plants to dry as long as possible into late summer and early fall. The husks should turn yellow/brown as they dry and the kernels should harden. Once the plants appear to be completely dry, or if wet weather is in the forecast, harvest the ears and bring them indoors. Remove the husks. Store the ears in mesh bags in a warm, dry, airy location. The ideal humidity level for curing popcorn is 13 to 14%. Curing is the process after drying that allows for long term storage of popcorn kernels. Once a week, remove a few kernels and try popping them. Popcorn that is chewy or kernels that have jagged edges after popping both mean that the kernels are not dry enough. Continue curing and test-popping until the desired texture is reached. Then remove the kernels and store them in an air-tight container.
105 Days
Approx: 55 Seeds
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