When to Plant Potato in Washington, District of Columbia (20421)
Location
Washington, District of Columbia
ZIP Code
20421
USDA Zone
8a
Last Frost
Friday, March 20, 2026
📅 Planting Calendar
Start Seeds Indoors Friday, January 23, 2026
Transplant Outdoors Friday, April 3, 2026
Pro Tip: Start Potato seeds indoors 8 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Solanum tuberosum
Days to Maturity 90 days
Mature Height 18-24"
Spread 12"
Type Tuber
Fruit Size Variable
☀️ Growing Requirements
☀️
Sun
Full Sun (6+ hours)
💧
Water
Regular (1-2 inches/week)
↔️
Spacing
12" apart
🌱
Planting Depth
4" deep
Seeds typically germinate in 8-21 days
🤝 Good Companions
BeanCornBrassicasHorseradishMarigold
⚠️ Avoid Planting Near
TomatoCucumberSquashSunflower
Other Plants for Washington
Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussel Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini
Growing Potato in Zone 8a
Potato (Solanum tuberosum) is a popular garden vegetable. In Washington, District of Columbia, which is in USDA Hardiness Zone 8a, you should start seeds indoors around Friday, January 23, 2026.
Your average last frost date is Friday, March 20, 2026. Plan to transplant your Potato seedlings outdoors around Friday, April 3, 2026, about 2 weeks after your last frost date.