GardenPotato variety
Kennebec Potato
✓ In your garden
Kennebec is a white potato, ready in about 90–120 days. An all-purpose potato — boil it, roast it, or mash it (texture varies by variety, from waxy to mealy). You grow potatoes from seed potatoes (not true seed): plant the pieces after frost, then hill soil up around the stems as they grow so the tubers stay covered.
“An all-purpose potato — good boiled, roasted, or mashed.”
Growing basics — shared by every potato
Kennebec grows like any other potato. The full picture — how deep to plant, spacing, feeding, pests, harvest — lives on the Potato page so it's maintained in one place.
- Sun
- Full Sun
- Spacing (in row)
- 10–12 in
- Row spacing
- 30–36 in
- Planting depth
- 3–6 in
- Soil pH
- 6–6.5
- Water
- Moderate
What is Kennebec good for?
- Boiling & saladsGood all-rounder. Great
- RoastingCrisp outside, creamy in. Great
- Mashing & friesStarchy types the fluffiest — russets are king. Great
From how it grows — kitchens vary.
What Kennebec is known for
Fedco Seeds describes this as:
- keeps a long time after picking
That is the company selling the seed, describing its own product. True, and worth weighing as such.
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Want the full 10/50/90% odds + nearest stations? Open the frost tool →When to plant Kennebec in your zone
Zone 6bGreenhouse or cover on: your start slides ~4 weeks earlier and your harvest stretches ~3 weeks later (shown striped).
Planting seeds straight in the ground only works where the season's long and warm — most gardeners start seeds indoors or buy young plants, or you'd pick your first tomato right as frost hits.
Comfortable — first ripe fruit lands around late Jun, well before your typical frost (~late Oct).
- Plant seeds outside
- late Mar – early Apr
- Growing
- early Apr – late Jun
- Picking
- late Jun – early Aug
Typical dates for zone 6b — set your zone or ZIP above for yours.
What to plant near Kennebec — and what to keep away
-
Cabbage familyTraditional
Old chart pairing.
-
TomatoPractical
Same family, same late blight. One sick bed infects the other.
The badge is the honesty. Trialed = a published field trial · Practical = a real mechanism · Traditional = companion-chart lore. These pairings hold for every potato.
Pairings compiled from West Virginia University Extension.
Growing Kennebec — the things that trip people up
- Plant certified seed potatoes, not grocery ones or true seed — cut larger ones so each piece has an “eye,” and let the cuts dry a day before planting after your last frost.
- Hill soil (or straw) up around the stems as they grow. Tubers form near the surface, and any that see sunlight turn green and mildly toxic — keep them covered.
Kennebec potato at a glance
| Type | White |
|---|---|
| Days to ripe | 90–120 days after you plant it outside |
| Color | White |
Extra fields from seed-catalog listings and university growing guides. Days to ripe and disease resistance shift with your climate and seed source — double-check with your local extension office before you buy.
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Common questions about Kennebec
How long does Kennebec take to grow?
About 90–120 days. Harvest “new potatoes” early and small, or wait until the tops die back for full-size storage tubers.
Do I grow Kennebec from seed?
No — potatoes grow from seed potatoes (small tubers with eyes), not true seed. Plant certified seed potatoes to avoid disease.
Why do I hill potatoes?
Tubers form near the surface. Mounding soil up around the stems gives them room and keeps them dark — exposed potatoes turn green and mildly toxic.
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