When to Plant Mint in Johnstown, Colorado (80534)
Location
Johnstown, Colorado
ZIP Code
80534
USDA Zone
5b
Last Frost
Saturday, April 25, 2026
📅 Planting Calendar
Direct Sow Outdoors Saturday, March 28, 2026
Pro Tip: Mint can be directly sown outdoors. Plant 4 weeks before your last frost date.
🌿 Plant Details
Scientific Name Mentha spicata
Days to Maturity 90 days
Mature Height 12-24"
Spread 24"
Type Spreading
Fruit Size N/A
☀️ Growing Requirements
☀️
Sun
Partial Shade to Full Sun
💧
Water
Regular (keep moist)
↔️
Spacing
18" apart
🌱
Planting Depth
0.25" deep
Seeds typically germinate in 10-15 days
🤝 Good Companions
CabbageTomatoPea
⚠️ Avoid Planting Near
ParsleyChamomile
Other Plants for Johnstown
Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram 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 Potato 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 Mint in Zone 5b
Mint (Mentha spicata) is a popular garden vegetable. In Johnstown, Colorado, which is in USDA Hardiness Zone 5b, you should direct sow seeds around Saturday, March 28, 2026.
Your average last frost date is Saturday, April 25, 2026. Mint grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.