Kandy Korn
Zea mays 'Kandy Korn'
An exceptionally sweet yellow corn that lives up to its candy-like name with superb sugar content and tender kernels. This early-maturing variety produces beautiful golden ears with excellent kernel fill and remarkable sweetness that holds well after harvest. Perfect for gardeners who want reliable, kid-friendly sweet corn that performs well in shorter growing seasons.
Harvest
84-89d
Days to harvest
Sun
Full sun
Zones
2–11
USDA hardiness
Height
5-8 feet
Planting Timeline
Showing dates for Kandy Korn in USDA Zone 7
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Kandy Korn · Zones 2–11
Growing Details
Zone-by-Zone Planting Calendar
| Zone | Indoor Start | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 1 | — | — | July – August | October – August |
| Zone 2 | — | — | June – August | October – September |
| Zone 11 | — | — | January – March | May – June |
| Zone 12 | — | — | January – March | May – June |
| Zone 13 | — | — | January – March | May – June |
| Zone 3 | — | — | June – July | September – October |
| Zone 4 | — | — | June – July | September – October |
| Zone 5 | — | — | May – June | September – October |
| Zone 6 | — | — | May – June | August – October |
| Zone 7 | — | — | April – June | August – September |
| Zone 8 | — | — | April – May | July – September |
| Zone 9 | — | — | March – April | June – August |
| Zone 10 | — | — | February – April | June – July |
Succession Planting
Direct sow Kandy Korn in zone 7 starting around April 15 — once soil temps hit 60°F consistently — and make a second planting 2-3 weeks later to extend your harvest window. A third sowing in late May to early June is feasible, but push past mid-June and you're threading a needle: the ears will silk right into peak corn earworm season in August, and pollination suffers when daytime highs stay above 95°F.
NC State Extension notes that supersweet corn varieties need isolation from standard and other sweet types to develop full flavor — Kandy Korn is an EH (everlasting heritage) type, so if you're also growing a supersweet variety nearby, keep at least 250 feet of separation or stagger plantings so they don't tassel simultaneously. Stop succession sowings by June 10 in zone 7; anything started after that will likely hit high heat during pollination, which causes poor kernel set regardless of how well you manage everything else.
Complete Growing Guide
Plant Kandy Korn in full sun with consistently moist, well-draining soil enriched with nitrogen, as this sugar-rich variety demands more nutrients than starchy corn types to fuel kernel development. Its 84-89 day maturity makes it ideal for northern gardens and short-season regions, so sow after soil reaches 60°F and succession-plant every two weeks for continuous harvest rather than a single glut. This cultivar's exceptional sugar content attracts corn earworm more aggressively than field corn varieties, so monitor ears closely starting at silking and consider preventative Bt applications. The tender kernels are prone to splitting if exposed to temperature fluctuations post-harvest, so pick ears in early morning when cool and refrigerate immediately to preserve sweetness. Space plants 8-12 inches apart in rows 30 inches wide to ensure adequate pollination and airflow, reducing fungal disease risk in humid climates.
Light: Full sun (6 or more hours of direct sunlight a day). Soil: Clay, High Organic Matter, Loam (Silt). Soil pH: Acid (<6.0), Neutral (6.0-8.0). Drainage: Good Drainage. Height: 5 ft. 0 in. - 8 ft. 0 in.. Spread: 1 ft. 0 in. - 2 ft. 0 in.. Spacing: 12 inches-3 feet. Growth rate: Rapid. Maintenance: Medium. Propagation: Seed. Regions: Coastal, Mountains, Piedmont.
Harvesting
Harvest Kandy Korn when silks turn dark brown and kernels reach full size with a slight give when pressed—this cultivar's exceptional sweetness peaks at this precise window. Check ears by peeling back the husk slightly to confirm kernels are plump and milky, not doughy or translucent. Pick continuously as ears mature rather than waiting for all to ripen simultaneously, since this early variety produces staggered maturity; this approach also encourages additional ear development. For maximum sugar content, harvest in early morning after temperatures cool overnight, as the plant's carbohydrate reserves are highest before the day's heat converts sugars to starch.
Color: Gold/Yellow. Type: Caryopsis. Length: > 3 inches. Width: 1-3 inches.
Garden value: Edible, Showy
Harvest time: Fall
Edibility: Edibile
Storage & Preservation
Fresh Kandy Korn maintains peak sweetness for 3-5 days when stored unhusked in the refrigerator at 32-35°F with high humidity. Keep ears in perforated plastic bags to maintain moisture while allowing air circulation. For immediate use within 24 hours, store at room temperature with husks on.
For long-term preservation, blanch whole ears in boiling water for 4-6 minutes, cool in ice water, then cut kernels from cob before freezing in airtight containers for up to 12 months. Kandy Korn also pressure cans beautifully—process pints for 55 minutes at 11 pounds pressure. The high sugar content makes this variety excellent for dehydrating into sweet corn kernels that rehydrate well for soups and stews.
History & Origin
The documented origin of Kandy Korn is limited, though it represents the broader mid-to-late twentieth-century American breeding emphasis on sugar-enhanced sweet corn varieties. The variety likely emerged from seed company development programs focused on producing early-maturing, high-sugar corn suitable for home gardeners and shorter growing regions. Its name reflects the confectionery marketing trend common among sweet corn introductions of that era. While specific breeder attribution or introduction year remains unclear in readily available horticultural records, Kandy Korn belongs to the lineage of improved sweet corn cultivars that built upon earlier sugar-corn genetics, emphasizing kernel tenderness and extended sugar retention after harvest—traits particularly valued for fresh market and home garden applications.
Origin: Mexico
Advantages
- +Exceptionally sweet flavor makes Kandy Korn highly appealing to children and families.
- +Early maturity at 84-89 days enables successful growth in shorter growing seasons.
- +Excellent kernel fill and post-harvest sugar retention ensure quality eating over time.
- +Easy growing difficulty makes Kandy Korn suitable for novice and experienced gardeners alike.
- +Beautiful golden ears with tender kernels provide both visual appeal and superior taste.
Considerations
- -Susceptible to multiple serious diseases including northern corn leaf blight and Stewart's wilt.
- -Vulnerable to several destructive pests including corn earworm and European corn borer damage.
- -Shorter maturity window requires precise timing and consistent conditions for optimal results.
- -High sugar content may attract more pest pressure compared to field corn varieties.
Companion Plants
The Three Sisters combination — corn with beans and squash — holds up for concrete structural reasons. Bush or pole beans fix atmospheric nitrogen into the soil, and Kandy Korn pulls from that heavily across its 84-89 day run. Squash spreads low and wide underneath, shading out weeds and holding the soil moisture that corn demands during Georgia's dry July stretches. The big, scratchy squash leaves also make it harder for raccoons to move quietly through the bed — not a fence, but it adds friction.
French marigolds (Tagetes patula) are worth planting around the border. Their root exudates deter certain nematode species, and around here in a zone 7 Georgia garden, root-knot nematode pressure on summer plantings is real enough to take seriously — NC State Extension flags nematode management as a soil-health priority for exactly this reason. Nasturtiums are useful as a sacrificial trap crop: aphids cluster on them preferentially, and you can pull and bin the whole plant if it gets bad. Dill and sunflowers bring in parasitic wasps that target corn earworm larvae — a slow-burn benefit, but worth having if corn is a regular part of your rotation.
Fennel stays out of the bed entirely. It releases allelopathic compounds that stunt neighboring plants, and corn is not exempt. Tomatoes are a worse neighbor than people expect — they share corn earworm as a primary pest, and putting the two crops side by side just gives Helicoverpa zea two adjacent food sources to cycle between. Separate them by at least one bed width, more if you can manage it. Black walnut produces juglone from its roots, and any vegetable planting within the drip line is at risk — don't site your corn there.
Plant Together
Beans
Fix nitrogen in soil that corn can utilize, classic Three Sisters combination
Squash
Spreads as ground cover to retain moisture and suppress weeds, completes Three Sisters guild
Marigolds
Repel corn earworms, aphids, and other harmful insects with strong scent
Nasturtiums
Trap crop for aphids and cucumber beetles, attracts beneficial predatory insects
Sunflowers
Provide windbreak protection and attract pollinators and beneficial insects
Dill
Attracts beneficial wasps that prey on corn borers and other corn pests
Lettuce
Grows well in partial shade of corn stalks, efficient use of garden space
Radishes
Break up compacted soil with taproots, mature quickly before corn needs full space
Keep Apart
Black Walnut
Releases juglone toxin that severely stunts corn growth and development
Fennel
Allelopathic compounds inhibit corn germination and root development
Tomatoes
Both are heavy feeders competing for same nutrients, attract similar pest insects
Nutrition Facts
Per 100g serving. % Daily Value based on 2,000 calorie diet. Source: USDA FoodData Central (FDC #168538)
Pests & Disease Resistance
Resistance
Good field tolerance to common corn diseases and environmental stress
Common Pests
Corn earworm, fall armyworm, European corn borer, Japanese beetles
Diseases
Northern corn leaf blight, gray leaf spot, common rust, Stewart's wilt
Troubleshooting Kandy Korn
What you'll see, why it happens, and what to do about it.
Ragged holes chewed through husks and into the tip of the ear, with visible frass (dark, wet-looking pellets) inside
Likely Causes
- Corn earworm (Helicoverpa zea) — the most predictable pest on sweet corn in the Southeast; moths lay eggs on fresh silks
- Fall armyworm (Spodoptera frugiperda) — similar damage but often hits earlier and chews deeper into the ear
What to Do
- 1.Apply a few drops of mineral oil to the silks 3-5 days after they emerge — this smothers newly hatched larvae before they bore in
- 2.Scout silks daily once they appear; if you see fresh frass at the tip, peel back the husk and remove larvae by hand on small plantings
- 3.For heavy pressure, apply Bt (Bacillus thuringiensis) or spinosad to the silks every 3-4 days during the silking window
Long, tan or grayish lesions running parallel to the leaf veins, appearing first on lower leaves around tasseling time
Likely Causes
- Northern corn leaf blight (Exserohilum turcicum) — a fungal disease that spreads fast in humid weather with overnight temps between 65-80°F
- Gray leaf spot (Cercospora zeae-maydis) — produces similar rectangular lesions; the two often show up together in wet summers
What to Do
- 1.Remove and bag (don't compost) heavily infected lower leaves to slow spread
- 2.Avoid overhead irrigation once plants are knee-high — drip or furrow irrigation keeps foliage drier
- 3.Rotate this bed out of corn and other grasses for at least 2 seasons; NC State Extension's disease management guidance recommends a 3-4 year rotation to break fungal cycles in the soil
Stunted plants with yellow-green streaking on leaves, wilting during the heat of the day even when soil is moist — showing up within 30-40 days of germination
Likely Causes
- Stewart's wilt (Pantoea stewartii) — a bacterial disease vectored by corn flea beetles (Chaetocnema pulicaria); flea beetle survival over winter is higher after mild winters, which matters in zone 7
- European corn borer (Ostrinia nubilalis) feeding damage to the stalk, which can mimic wilt symptoms from the outside
What to Do
- 1.Check lower leaves for tiny, rectangular feeding scars — that's the flea beetle signature; if present, treat with pyrethrin or kaolin clay early, before bacteria are introduced
- 2.Pull and dispose of any plant showing full-plant wilt with streaking; Stewart's wilt has no cure and the bacterium spreads through additional flea beetle feeding
- 3.Next season, prioritize early flea beetle control — Kandy Korn as an EH hybrid has limited tolerance for Stewart's wilt, so suppressing the vector is your main lever
Frequently Asked Questions
How long does Kandy Korn take to grow from seed to harvest?▼
Is Kandy Korn good for beginner gardeners?▼
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When should I plant Kandy Korn seeds?▼
How do you prevent corn earworm damage on Kandy Korn?▼
Growing Guides from Wind River Greens
Where to Buy Seeds
Sources & References
External authority sources used in compiling this guide.
See the Methodology page for how this data is sourced, what's AI-assisted, and known limitations.