🌱 MyLocalPlanting

When to Plant Mustard in Zone 12A

USDA Zone

12A

Cities Covered

25

Avg Last Frost

Friday, January 1, 2027

Plant Type

Direct Sow

📅 Planting Calendar for Zone 12A

Direct Sow Outdoors Friday, November 20, 2026

Pro Tip: Mustard can be directly sown outdoors. Plant 6 weeks before your last frost date.

🌿 Plant Details

Scientific Name Brassica juncea
Days to Maturity 56 days
Sun Requirements Full Sun

Cities in Zone 12A

Aiea, Hawaii Anahola, Hawaii Haiku, Hawaii Hanalei, Hawaii Waikoloa, Hawaii Kalaheo, Hawaii Kapaa, Hawaii Kualapuu, Hawaii Kunia, Hawaii Kurtistown, Hawaii Lawai, Hawaii Lihue, Hawaii Makawao, Hawaii Makaweli, Hawaii Papaikou, Hawaii Pearl City, Hawaii Wahiawa, Hawaii Pukalani, Hawaii Mililani, Hawaii Kula, Hawaii Waialua, Hawaii Waipahu, Hawaii Wheeler Army Airfield, Hawaii Schofield Barracks, Hawaii Camp H M Smith, Hawaii

Other Plants for Zone 12A

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 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 3a 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 12b Zone 13a

Growing Mustard in USDA Zone 12A

Mustard (Brassica juncea) grows well in USDA Hardiness Zone 12A. This zone includes cities like Aiea, Anahola, Haiku and 22 more.

The average last frost date for Zone 12A is around Friday, January 1, 2027. Mustard can be directly sown outdoors around Friday, November 20, 2026.

Expect to harvest your Mustard approximately 56 days after planting.