When to Plant Potato in Cardwell, Montana (59721)
Location
Cardwell, Montana
ZIP Code
59721
USDA Zone
5a
Last Frost
Sunday, May 10, 2026
📅 Planting Calendar
Start Seeds Indoors Sunday, March 15, 2026
Transplant Outdoors Sunday, May 24, 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 Cardwell
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 5a
Potato (Solanum tuberosum) is a popular garden vegetable. In Cardwell, Montana, which is in USDA Hardiness Zone 5a, you should start seeds indoors around Sunday, March 15, 2026.
Your average last frost date is Sunday, May 10, 2026. Plan to transplant your Potato seedlings outdoors around Sunday, May 24, 2026, about 2 weeks after your last frost date.