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When to Plant Sunflower in Zone 13A

USDA Zone

13A

Cities Covered

2

Avg Last Frost

Thursday, January 1, 2026

Plant Type

Direct Sow

📅 Planting Calendar for Zone 13A

Direct Sow Outdoors Thursday, January 8, 2026

Pro Tip: Sunflower can be directly sown outdoors. Plant -1 weeks before your last frost date.

🌿 Plant Details

Scientific Name Helianthus annuus
Days to Maturity 80 days
Sun Requirements Full Sun (6-8 hours)
Plant Spacing 18" apart

Cities in Zone 13A

Keauhou, Hawaii M C B H Kaneohe Bay, Hawaii

Other Plants for Zone 13A

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 Brussels 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 Marigold Zinnia Nasturtium Cosmos Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mâche Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree

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 12a Zone 12b

Growing Sunflower in USDA Zone 13A

Sunflower (Helianthus annuus) grows well in USDA Hardiness Zone 13A. This zone includes cities like Keauhou, M C B H Kaneohe Bay.

The average last frost date for Zone 13A is around Thursday, January 1, 2026. Sunflower can be directly sown outdoors around Thursday, January 8, 2026.

Expect to harvest your Sunflower approximately 80 days after planting.