Glass Gem Corn Seeds – kviterseeds.com
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Glass Gem Corn Seeds – kviterseeds.com
Glass Gem Corn Seeds – kviterseeds.com – photo 2
Glass Gem Corn Seeds – kviterseeds.com – photo 3
Glass Gem Corn Seeds – kviterseeds.com – photo 4
Glass Gem Corn Seeds – kviterseeds.com – photo 5

Glass Gem Corn Seeds

Zea Mays
$6.99
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About

Glass Gem Corn (Zea Mays) is a Cherokee heritage variety developed by Oklahoma farmer Carl Barnes, who spent decades crossing traditional Native American corn strains to revive varieties that had nearly disappeared entirely. The result is ears with translucent, jewel-colored kernels — deep purple, ruby red, gold, teal, pink — with no two ears the same. Plants grow upright to 6–9 feet, producing multiple side stalks and several ears per plant. It is a warm-season annual suited for USDA Zones 3–11, grown mainly as an ornamental popcorn variety, though the dried kernels grind into cornmeal just as well. Of all the rainbow corn seeds on the market, this is one of the few with a genuinely documented origin and cultural history behind it.

Quick Facts

Life Cycle
Life Cycle Annual
USDA Zones
USDA Zones 05–10
Light Requirements
Light Requirements Full sun
Germination Time
Germination Time 5-14 days
Stratification
Stratification Not required
Spacing
Spacing 6-8 inches
Sowing Method
Sowing Method Direct Sow
Soil
Soil Well-drained; Moist
Flowering Period
Flowering Period -
Water Requirements
Water Requirements Moderate (regular watering)
Maturity Time
Maturity Time 100-120 days
Growing Habit
Growing Habit Upright

How to Grow & Harvest

Sowing & Timing

Direct sow Glass Gem Corn seeds outdoors in mid to late spring, once soil temperature holds steadily at 60°F or above — corn planted in cold soil does not just germinate slowly, it often rots before it sprouts. Plant 1 inch deep, 6–8 inches apart, in rows spaced 30 inches apart. If your growing season is short, starting seeds indoors 2–3 weeks before the last frost buys you some time, though the transplant window is narrow. Germination takes 5–14 days. One detail most seed packets gloss over: sow in blocks of at least 4 rows, not single lines. Glass Gem is wind-pollinated, and a single row produces poorly filled ears no matter how well you manage everything else.

Soil, Watering & Fertilization

Full sun is non-negotiable — 6–8 hours minimum, in open ground away from shade. Soil should be moist, well-drained, and sit between pH 6.0 and 7.0; work compost in before planting because this crop is a heavy feeder over a long season. Soil temperature during germination ideally stays between 55–65°F for even sprouting. Water at 1 to 1.5 inches per week while plants are growing, and do not let moisture drop during silking and pollination — that specific window is when water stress does the most damage to kernel development and color. Mulching between rows is worth the effort on hot, dry sites.

Growth & Harvest

Glass Gem produces tillers — side stalks that carry additional ears — and unlike some sweet corn varieties, these should be left alone rather than removed. Side-dress with nitrogen fertilizer at knee height, then again at waist height; the plants push hard through the 6–9 foot range and need the support. Growing temperatures between 65–85°F give the best results; sustained heat above 95°F during pollination reduces kernel set noticeably. For ornamental use, wait until the husks are fully dry and brown before harvesting — kernel colors are most saturated and translucent at that stage, which is the whole point of growing glass gem corn seeds in the first place. For popcorn, leave ears on the stalk until completely dry, then cure indoors for 3–4 weeks before popping.

FAQ

Are Glass Gem Corn seeds non-GMO?

Yes, at KVITER you can buy Glass Gem Corn seeds, which are heirloom, open-pollinated and non-GMO. Order premium quality Corn 100 seed packet online at KVITER and enjoy high germination rates. All orders over $49 ship free, so add a few more seed packets to your order if you are planning a full kitchen garden for the season.

Is Glass Gem Corn easy to grow?

For anyone with outdoor space and full sun, yes. The two things that catch beginners off guard are soil temperature at planting time and block sowing for pollination. Get those right and the crop largely takes care of itself. Skip the block layout and expect disappointing ears, regardless of how well everything else goes.

Can Glass Gem Corn be grown in containers?

Not practically. Plants reach 6–9 feet with deep root systems, and block planting for wind pollination is not workable in pots. In-ground beds or deep raised beds are the realistic option here.

What are the best companion plants?

The Three Sisters planting — corn, beans, squash — is the traditional approach and works well for good reason: beans fix nitrogen at the base of corn stalks, and squash between rows suppresses weeds and keeps moisture in the soil. Keep fennel away from corn; it inhibits growth across most of the brassica and allium families.