How to Grow Potomac Bicolor Corn
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Potomac Bicolor Corn
Zea mays
vegetablePotomac Bicolor is a hybrid sweet corn variety that produces ears with a striking combination of white and yellow kernels. Known for its excellent flavor, tender texture, and reliable production, it's a popular choice for home gardeners and commercial growers. The plants typically reach 6-7 feet tall and mature relatively early for a bicolor variety.
When should you plant Potomac Bicolor Corn in your zone?
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Example Potomac Bicolor Corn timeline · Pittsburgh, PA (Zone 6b)
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Plant Potomac Bicolor Corn
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Potomac Bicolor Corn
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Potomac Bicolor Corn dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-8, can be grown in 3-9 with appropriate timing
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Get my Potomac Bicolor Corn timeline →Growth Stages
Seedling
7-10 days after emergenceEmerged shoots with 2-4 true leaves visible
Thin seedlings to proper spacing once they have 2-3 true leaves. Ensure consistent moisture and protect from birds.
Vegetative Growth
3-4 weeksPlant develops 6-10 leaves, roots deepen, height increases to 1-3 feet
Apply nitrogen fertilizer when plants are 6-8 inches tall. Monitor for pests. Maintain consistent watering.
Tasseling & Silking
1-2 weeksTassel emerges from top of plant, silks emerge from ear shoots, pollen is released
This is critical for pollination. Maintain even moisture—drought stress now severely reduces yield. No overhead watering if possible to prevent silk blockage.
Kernel Development
2-3 weeksSilks brown and dry, kernels fill with milk, ears become heavier and fuller
Continue regular watering. Plants reach maximum height (6-7 feet). Support with staking if wind-prone. Fertilize again if growth appears slow.
Harvest Readiness
3-7 days optimal harvest windowKernels plump and milky when squeezed, silks brown and dried, husks tight and green
Check ears daily once silks brown. Harvest at peak milk stage for best sweetness. Cool immediately after picking to preserve sugar content.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Bacillus thuringiensis (Bt) spray, apply when silks first appear and repeat every 3-5 days. Hand-pick visible worms. Parasitic wasps as biological control.
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Bt spray in early growth stage. Remove and destroy infested stalks. Crop rotation. Plant resistant varieties when available.
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Keep area free of plant debris. Monitor for entry holes. Apply insecticidal soap if caught early. Encourage natural predators.
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Bt spray. Remove weeds and debris. Hand-pick if infestation is light. Spinosad products for heavy infestations.
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Strong water spray to dislodge. Neem oil or sulfur sprays. Increase humidity and avoid over-fertilizing with nitrogen.
Uses
Fresh eating and cooking
CulinaryPotomac Bicolor's tender, sweet kernels with the visual appeal of bicolor kernels make it excellent for fresh eating, boiling, grilling, and corn salads. The balanced sweetness and texture are ideal for direct consumption and cooking applications. [source]
Freezing and preservation
CulinaryThe kernels can be blanched and frozen for long-term storage, retaining good texture and flavor when properly preserved. Quick freezing preserves the high sugar content better than canning. [source]
Wildlife food source
WildlifeCorn provides important food for birds, squirrels, and other wildlife. Leaving some ears for wildlife while harvesting for household use supports local ecosystems. [source]
Decorative and craft uses
HouseholdThe bicolor kernels with their white and yellow striping make the ears visually striking for fall decorations, dried corn arrangements, and craft projects. [source]
Corn silk herbal tea
MedicinalThe silks can be harvested and dried to make a traditional herbal tea used in folk medicine for its potential diuretic properties and mild nutritional benefits. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when silks turn brown and dry, husks are green and tight, and kernels are at the milk stage (they release milky liquid when squeezed). Peak flavor occurs 20-24 hours after silking. Pick in the cool morning before heat of the day. Grasp ear firmly and twist downward. Use immediately or refrigerate unwrapped for maximum sweetness retention. Flavor degrades quickly as sugars convert to starch.
Fun Facts
- 🌱 Potomac Bicolor's striking white and yellow kernel pattern makes it visually distinctive and is a favorite for farmers' markets because of its eye appeal alongside its excellent flavor.
- 🌱 A single corn plant can produce 1-2 ears, and the plant's tassel contains millions of pollen grains—each kernel requires one pollen grain landing on its silk for proper development.
- 🌱 Corn is one of the fastest-growing garden vegetables; under ideal conditions, it can grow over 2 inches per day during its peak growth phase.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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