When to Plant Watermelon in Saint Helena Island, South Carolina (29920)

Location

Saint Helena Island, South Carolina

ZIP Code

29920

USDA Zone

Last Frost

Wednesday, February 10, 2027

📅 Planting Calendar

Start Seeds Indoors Wednesday, January 13, 2027

Transplant Outdoors Wednesday, February 24, 2027

Pro Tip: Start Watermelon seeds indoors 4 weeks before your last frost date for best results.

🌿 Plant Details

Scientific Name Citrullus lanatus

Days to Maturity 80 days

Mature Height 12-24"

Spread 72"

Type Vine

Fruit Size Large (10-30 lbs)

☀️ Growing Requirements

☀️

Sun

Full Sun (8+ hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

72" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 4-12 days

🤝 Good Companions

CornSunflowerMarigold

⚠️ Avoid Planting Near

Potato

Other Plants for Saint Helena Island

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 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 Zucchini

Growing Watermelon in Zone 9b

Watermelon (Citrullus lanatus) is a popular garden vegetable. In Saint Helena Island, South Carolina, which is in USDA Hardiness Zone 9b, you should start seeds indoors around Wednesday, January 13, 2027.

Your average last frost date is Wednesday, February 10, 2027. Plan to transplant your Watermelon seedlings outdoors around Wednesday, February 24, 2027, about 2 weeks after your last frost date.