When to Plant Rosemary in Zone 12B
USDA Zone
12B
Cities Covered
97
Avg Last Frost
Friday, January 1, 2027
Plant Type
Indoor Start
📅 Planting Calendar for Zone 12B
Start Seeds Indoors Friday, October 23, 2026
Transplant Outdoors Friday, January 15, 2027
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 12B
Captain Cook, Hawaii Eleele, Hawaii Ewa Beach, Hawaii Kapolei, Hawaii Kapolei, Hawaii Hakalau, Hawaii Haleiwa, Hawaii Hanamaulu, Hawaii Hanapepe, Hawaii Hauula, Hawaii Hawi, Hawaii Hilo, Hawaii Princeville, Hawaii Honomu, Hawaii Hoolehua, Hawaii Kaaawa, Hawaii Kahuku, Hawaii Kahului, Hawaii Kahului, Hawaii Kailua, Hawaii Kailua Kona, Hawaii Kalaupapa, Hawaii Kaneohe, Hawaii Kailua Kona, Hawaii Kaumakani, Hawaii Kaunakakai, Hawaii Keaau, Hawaii Kealakekua, Hawaii Kealia, Hawaii Kekaha, Hawaii Kihei, Hawaii Kilauea, Hawaii Kapaau, Hawaii Koloa, Hawaii Lahaina, Hawaii Laie, Hawaii Lanai City, Hawaii Laupahoehoe, Hawaii Lahaina, Hawaii Maunaloa, Hawaii Naalehu, Hawaii Pahala, Hawaii Pahoa, Hawaii Paia, Hawaii Papaaloa, Hawaii Pepeekeo, Hawaii Puunene, Hawaii Waianae, Hawaii Wailuku, Hawaii Waimanalo, Hawaii Waimea, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Honolulu, Hawaii Hickam Afb, Hawaii Fort Shafter, Hawaii Tripler Army Medical Ctr, Hawaii Pearl Harbor, Hawaii Wake Island, Hawaii
Other Plants for Zone 12B
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
Growing Rosemary in USDA Zone 12B
Rosemary (Salvia rosmarinus) grows well in USDA Hardiness Zone 12B. This zone includes cities like Captain Cook, Eleele, Ewa Beach and 94 more.
The average last frost date for Zone 12B is around Friday, January 1, 2027. For best results, start your Rosemary seeds indoors around Friday, October 23, 2026, then transplant outdoors around Friday, January 15, 2027.
Expect to harvest your Rosemary approximately 120 days after planting.