Family Owned Since 1979
Cultivating Gardeners



Product Description:

110-120 days. This stunning popcorn produces a treasure trove of colorful corn that glows with the splendor of stained glass. Glass Gem's jewel-tone kernels range from pale white, gold, pinks, reds, purples, greens, blues and oranges. Arranged in vibrant patterns, each ear is a uniquely spectacular gleaming rainbow with occasional solid-colored ears in blood red or blue-black. Plants tower 6-7 feet and taller, often producing 3 or 4 ears each ranging from 3-8 inches long. Glass Gem also grinds into tasty cornmeal or pops into white popcorn!
  • Key Features:




  • Key Features:

Customer Reviews

Based on 5 reviews
Dennis K.
Easy to Grow

I planted my seed at 4 inch spacing in a 3 ft x 6 ft area. I had close to 100% germination, there were no bare spots in the double dug raised bed. I watered well throughout the spring and summer and the stalks range from 6 to 9 feet tall. I just peeled back a coupe of cobs and both were filled with multicolored kernels. Still have a while until it is ready to harvest but this is a fun and easy crop to grow.

Beautiful Kernels and so easy a 5 year old can do it

My 5 year old chose this to plant in our front yard and it grew great! Beautiful Kernels And we have already harvested some on 8/3

We did hand pollinate it since we only planted 2 rows

Still waiting for corn to sprout

It has been almost two weeks and now the weather is cooling again, 70s in the day 50s at night....does that matter? Started in a really large bucket, all early day sun, no late afternoon. Plenty of composted manure, but nothing coming up. I planted some of every shade, Hoping.....

Andrea C.
Update on January teview

An update on a previous review. While the seeds I received were quite small and disappointing, I planted them anyway to see what would happen. I am pleased to report that despite their lackluster size and color, the seeds germinated well at about a 93% germ rate. I am hopeful that by selecting good results and saving seeds, combined with using seeds from another company, I can make something of these in the future.

Soil Temp for Germ 65–85°F
Seed Depth 1–2"
Seed Spacing 4"
Days to Emergence 7–14
Thin Plants to 8–12"
Row Spacing 24–30"
Fertilizer Needs High
Minimum Germination 80%
Seeds per Ounce ≈ 110–250
Seed Life 1 year

Zea mays

Days to maturity are calculated from date of direct seeding.

Hybrid SE/se Corn: The inherited sugar enhanced (SE/se) traits are what make these corn varieties unique. For starters, the kernel walls are the most tender of all corn varieties. Added to that are more sugars, making every ear as sweet as can be. After harvest, the conversion from sugar to starch in SE/se corn is delayed, so the corn maintains its sweetness longer after picking. To top it off, no isolation is required from other normal types of sweet corn, making SE/se corn very popular. For best germination, soil temperature should be at least 70°F.

Hybrid sh2 Supersweet Corn: The shrunken gene (sh2) gives the dried kernels an extra-wrinkled appearance. This inherited characteristic increases the sweetness of the corn at harvest time. Commonly called Supersweet, sh2 varieties are some of the sweetest corn available. They do not germinate well in cold wet soil, so make sure your soil is at least 70°F; use a soil thermometer if uncertain. To grow great Supersweet corn, isolate it by time or distance from any other corn.

OP Sweet Corn: For best seed saving results we recommend bagging plants to avoid cross pollination.

Ornamental Corn: Often used for decorating, but it also makes great cornmeal and corn flour. Grow just as you do sweet corn. The earliest plantings are preferred to ensure ample time for field drying. Ears may be picked after the husks begin drying. Isolation is necessary between varieties to preserve color combinations.

Popcorn: After picking and husking, spread the ears in a dry, airy place and allow to cure for several weeks. Test-pop a few kernels periodically to determine when the kernels are dry enough to make into popcorn. Twist the kernels from the cobs and store in airtight containers. Large quantities can be processed by placing into heaps and stomping the kernels off the ears. For best results, isolate from any other corn.

Synergistic Corn: Synergistic corn has 75% sugar enhanced kernels and 25% Supersweet kernels. It combines the exceptional tenderness and sweet corn flavor of SE/se varieties with the extra sweetness, extended shelf life and field-holding ability of sh2 varieties. For best results, isolate Synergistic corn from any other corn. For best germination, soil temperature should be at least 70°F.

• Corn performs best in fertile, well-drained soil with a pH between 6.0-7.0
• Corn is a heavy feeder requiring high amounts of nitrogen during the vegetative stage
• Waiting for soil to reach optimum temperature is critical to successful corn growing
• Corn is wind pollinated - for proper pollination plant individual varieties in blocks of at least 4 rows
• Separate varieties by time (plant 10 days apart), or distance (200 feet) to reduce cross-pollination
• For optimum growth ensure beds are watered evenly and deeply

Direct Sowing
• Make row furrows about 6-8 inches deep
• Spread 3-5 pounds of TSC's Complete fertilizer per 100 square feet
• Back fill the furrow, then sow seeds and cover with soil or sifted compost
• Thin seedlings when 4-5 inches

• Start indoors 2-3 weeks before desired transplant date
• Avoid letting starts get root bound and avoid damaging roots when planting

Insects & Diseases
• Common insects: Corn borer, corn ear worm
• Insect control: Pyrethrin, applied before silking, Monterey B.t. to silks
• Common diseases: Blight, rust, smut
• Disease prevention: 3-4 year crop rotation, remove old stalks in the fall, and contact your local extension agent with specific issues

Harvest & Storage
• Harvest when kernels are full and milky
• Drying and browning of ear silks is also an indicator of maturity
• Ears should be cooled as quickly as possible and stored at 36°F

HR indicates high resistance.
IR indicates intermediate resistance.
MDMV | Maize Dwarf Mosaic Virus
NCLB | Northern Corn Leaf Blight
R | Common Rust
SCLB | Southern Corn Leaf Blight
SW | Stewart's Wilt

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