Glass Gem Corn Seeds (Organic)

Glass gem corn is a stunning heirloom variety celebrated for its rainbow-colored corn kernels that shimmer like gemstones. This unique decorative corn, with vibrant and translucent hues ranging from deep blues to pale pinks, is as beautiful as it is versatile. While primarily grown for ornamental purposes, it can also be used for making popcorn or ground into cornmeal, offering a touch of practicality to its dazzling beauty. Thriving in full sun and well-drained soil, this heirloom corn variety is relatively easy to grow, making it an excellent choice for gardeners of all skill levels.

Variety Details

• Botanical name: Zea mays
• Plant type: Tender Annual
• Growth habit: Upright
• Crop category: Corn
• Kitchen profile: While primarily grown for its visual appeal, Glass Gem Corn can be ground into cornmeal for culinary use.
• Recorded feature: Open-Pollinated
• Product format: Seed packet with a separately listed bulk option

Sowing & Growing

• Soil Temperature: 70-85°F
• Planting Depth: 1"
• Germination: 4-12 Days
• Height At Maturity: 6-9'
• Days to Maturity: 110-120 Days
• Sun/Shade: Full Sun
• Spacing After Thinning: 8"

Direct sow Glass Gem Corn after the soil has warmed, arranging plants in a block rather than one long row when space permits. Block planting places more plants near one another during wind pollination. Thin to the recorded spacing and check root-zone moisture as stalks develop. Harvest timing depends on the corn type: sweet corn is picked for fresh kernels, while flour, popcorn, and ornamental types remain longer to dry. Use the product’s maturity and harvest cues when evaluating ears.

Plant it in rows with adequate spacing for optimal growth, and enjoy watching the colorful ears develop over the season.

Tips for planting ornamental corn include ensuring consistent watering and applying organic mulch to retain soil moisture.

Before sowing Glass Gem Corn, review the packet alongside the current product details and note any range in temperature, germination, or maturity. Ranges reflect biological and seasonal variation rather than a fixed promise. Label each planting with its date and location, then compare emergence, growth, and harvest with local weather. This record is useful for succession plantings and for deciding whether the crop fits better into an earlier or later seasonal window.

Explore related options in our Growing Guide.