🥕 Potato
Solanum tuberosum
vegetables tuber (root vegetable)
☀️ Sun
Full sun (6–8 hours)
💧 Water
Medium–high; 1–2 inches per week; consistent moisture especially during tuber initiation (when plants flower); reduce water near harvest to toughen skins
🗺️ Zones
2, 3, 4, 5, 6, 7, 8, 9, 10
🪴 Soil Type
Loose, well-drained sandy loam; deeply cultivated; high organic matter
🧪 Soil pH
4.8–6.5 (acidic to slightly acidic — potatoes tolerate and often prefer more acidic soil than most vegetables)
💧 Drainage
Excellent drainage critical — potatoes rot in waterlogged soil; raised beds or hilled rows recommended
📏 Spacing
Seed pieces 10–12 inches apart in rows 30–36 inches apart; cover with 3–4 inches soil, hill as plants grow
📅 Days to Maturity
75-120 days (from seed potatoes); early varieties 75-90 days, main crop 100-120 days
🍴 Edible Parts
🍽️ ["Tubers (do NOT eat green tubers \u2014 solanine is toxic)"🍽️ "Leaves and stems are POISONOUS (solanine)"]
🤝 Companions (8)
Beans repel Colorado potato beetle; potatoes repel Mexican bean beetle — a truly mutual pest-repelling partnership; beans fix nitrogen
🤝 Horseradish
Increases potato disease resistance; horseradish contains antimicrobial compounds that may reduce potato blight; plant at corners of potato patch
Suppresses nematodes; repels Colorado potato beetle and flea beetles
Trap crop for aphids; repels Colorado potato beetle and flea beetles
🤝 Cilantro/Coriander
Attracts hoverflies and parasitic wasps that prey on potato beetle larvae
🤝 Flax
Repels Colorado potato beetle; improves potato growth
🤝 Petunia
Repels potato beetles and leafhoppers; beautiful addition to the garden
Peas fix nitrogen in the soil, benefiting nitrogen-hungry potatoes; peas are harvested early, freeing space for potatoes to expand. A well-documented companion pair per WVU Extension and the Almanac.
⚠️ Keep Apart (18)
Both Solanaceae — share early blight (Alternaria) and late blight (Phytophthora infestans); tomatoes may stunt potato growth; never plant in same soil sequentially
Potatoes compete heavily for nutrients; harvesting potatoes damages cucumber roots
Sunflowers may stunt potato growth through allelopathy or competition; conflicting evidence
Raspberries can harbor Verticillium wilt which affects potatoes; also blight sharing
Artichoke shares blight and disease susceptibility with potatoes, increasing risk of cross-infection.
Asparagus is a heavy feeder whose roots are disturbed by potato harvesting; both compete for potassium and phosphorus.
Eggplant shares blight and disease susceptibility with potatoes, increasing risk of cross-infection.
Melon shares blight and disease susceptibility with potatoes, increasing risk of cross-infection.
Pumpkin shares blight and disease susceptibility with potatoes, increasing risk of cross-infection.
Radish competes with potatoes for nutrients and can harbor shared pests and diseases.
Rutabaga is a heavy feeder whose roots are disturbed by potato harvesting; both compete for potassium and phosphorus.
Spinach competes with potatoes for nutrients and can harbor shared pests and diseases.
Summer Squash shares blight and disease susceptibility with potatoes, increasing risk of cross-infection.
Swiss Chard is a heavy feeder whose roots are disturbed by potato harvesting; both compete for potassium and phosphorus.
Turnip is a heavy feeder whose roots are disturbed by potato harvesting; both compete for potassium and phosphorus.
Watermelon is a heavy feeder whose roots are disturbed by potato harvesting; both compete for potassium and phosphorus.
Winter Squash shares blight and disease susceptibility with potatoes, increasing risk of cross-infection.
Zucchini shares blight and disease susceptibility with potatoes, increasing risk of cross-infection.
💊 Medicinal Uses
["High in vitamin C (historically prevented scurvy); one medium potato = ~45% daily vitamin C", "Excellent source of potassium (more than bananas per serving)", "Rich in vitamin B6, fiber (with skin), and resistant starch (when cooled \u2014 feeds gut bacteria)", "Traditional: raw potato poultice for burns, skin inflammation, and eye puffiness"]
📝 Notes
Potatoes are grown from 'seed potatoes' (not true seeds) — certified disease-free tubers cut into pieces with at least 2 eyes each. Always rotate Solanaceae (potatoes, tomatoes, peppers, eggplant) on a 3–4 year cycle. Hilling (mounding soil around stems) is essential — tubers exposed to light turn green and toxic (solanine). Major diseases: late blight (historic Irish Potato Famine), early blight, scab (reduced by acidic soil).