🌱 MyLocalPlanting

When to Plant Rosemary in Zone 3A

USDA Zone

3A

Cities Covered

25

Avg Last Frost

Monday, May 25, 2026

Plant Type

Indoor Start

📅 Planting Calendar for Zone 3A

Start Seeds Indoors Monday, March 16, 2026
Transplant Outdoors Monday, June 8, 2026

Pro Tip: Start Rosemary seeds indoors 10 weeks before your last frost date for best results.

🌿 Plant Details

Scientific Name Salvia rosmarinus
Days to Maturity 120 days
Sun Requirements Full Sun (6+ hours)
Plant Spacing 24" apart

Cities in Zone 3A

Embarrass, Minnesota Soudan, Minnesota Tower, Minnesota Loman, Minnesota Ranier, Minnesota Swift, Minnesota Oak Island, Minnesota Anchorage, Alaska Aniak, Alaska Crooked Creek, Alaska Grayling, Alaska Holy Cross, Alaska Red Devil, Alaska Shageluk, Alaska Fairbanks, Alaska Deering, Alaska Delta Junction, Alaska Fort Yukon, Alaska Kaktovik, Alaska Kivalina, Alaska Point Hope, Alaska Ruby, Alaska Shishmaref, Alaska Teller, Alaska Brevig Mission, Alaska

Other Plants for Zone 3A

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley 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

Browse Other Zones

Zone 1a Zone 1b Zone 2a Zone 2b Zone 3b Zone 4a Zone 4b Zone 5a Zone 5b Zone 6a Zone 6b Zone 7a Zone 7b Zone 8a Zone 8b Zone 9a Zone 9b Zone 10a Zone 10b Zone 11a Zone 11b Zone 12a Zone 12b Zone 13a

Growing Rosemary in USDA Zone 3A

Rosemary (Salvia rosmarinus) grows well in USDA Hardiness Zone 3A. This zone includes cities like Embarrass, Soudan, Tower and 22 more.

The average last frost date for Zone 3A is around Monday, May 25, 2026. For best results, start your Rosemary seeds indoors around Monday, March 16, 2026, then transplant outdoors around Monday, June 8, 2026.

Expect to harvest your Rosemary approximately 120 days after planting.