How to Grow Kennebec Potato
Solanum tuberosum 'Kennebec'
Kennebec Potato is a versatile medium-eared variety prized for its excellent late blight resistance and reliable yield. Gardeners grow this cool-season crop for its high-quality waxy flesh that holds shape well when boiled or mashed, making it a staple in summer kitchens across many regions.
📷 Wikipedia: PotatoStarting Kennebec Potato: indoors or direct sow?
🌾 Sow directly in the garden — Kennebec Potato is not usually started indoors.
Potatoes are typically direct-sown or planted in the garden rather than started indoors as seedlings.
Soil, care & harvest
Prepare loose, fertile soil with a pH between 5.0 and 6.5 to encourage healthy tuber development. Since potatoes are cool-season crops, you can start seed pieces indoors about 2 weeks before the last frost or plant them directly outdoors as soon as the ground is workable in early spring. Place cut seed pieces 12 inches deep once they have sprouted small shoots.
Space plants 12 to 15 inches apart within rows set 30 to 36 inches wide to ensure good air circulation. Hill soil around the stems as they grow to protect developing tubers from sunlight and encourage more growth. Provide consistent moisture, aiming for 1 to 2 inches of water per week, but avoid wetting the foliage near harvest time.
Watch for Colorado potato beetles, aphids, wireworms, and flea beetles; hand-pick beetles early and use row covers if needed. Monitor for early blight and common scab by ensuring proper drainage and avoiding overhead watering. Harvest the crop 80 to 100 days after planting when vines begin to yellow naturally.
When to Plant Kennebec Potato
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | — | June – July | September |
| Zone 2 | — | May – July | August – September |
| Zone 3 | — | May – June | August – October |
| Zone 4 | — | April – June | July – October |
| Zone 5 | — | April – May | July – November |
| Zone 6 | — | April – May | July – November |
| Zone 7 | — | March – May | June – November |
| Zone 8 | — | March – April | June – December |
| Zone 9 | — | February – March | May – December |
| Zone 10 | — | January – March | April – December |
| Zone 11 | — | January – February | March – December |
| Zone 12 | — | January – February | March – December |
| Zone 13 | — | January – February | March – December |
Companion Plants for Kennebec Potato
✓ Good companions
Fix nitrogen in soil, improving potato growth and yield
Different nutrient needs, helps maximize garden space efficiency
Repel aphids and may improve potato flavor and growth
Provides windbreak and shade, compatible root systems
Repels Colorado potato beetles and improves disease resistance
Repel Colorado potato beetles and nematodes, reduce soil pests
Trap crop for Colorado potato beetles and aphids, repel squash bugs
Attracts beneficial insects and doesn't compete for nutrients
✗ Keep away from
Strong allelopathic effects that stunt potato growth and development
Allelopathic compounds inhibit potato growth and development
Same family as potatoes, share diseases like blight and attract same pests
Nutrition Facts
Per 100g serving (USDA FoodData Central)
