When to Plant Cucumber in Hilo, Hawaii (96721)

Location

Hilo, Hawaii

ZIP Code

96721

USDA Zone

12b

Last Frost

Thursday, January 1, 2026

📅 Planting Calendar

Direct Sow Outdoors Thursday, November 20, 2025

Pro Tip: Sow Cucumber directly outdoors 6 weeks before your last frost date.

🌿 Plant Details

Scientific Name Cucumis sativus

Days to Maturity 55 days

Mature Height 12-72"

Spread 36"

Type Vine

Fruit Size Medium (6-8 inches)

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

High (consistent moisture)

↔️

Spacing

36" apart

🌱

Planting Depth

1" deep

Seeds typically germinate in 3-10 days

Ready to Plant Cucumber in Hilo?

Get your seeds now so they're ready by Thursday, November 20, 2025.

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🤝 Good Companions

BeansPeasRadishSunflowerCorn

⚠️ Avoid Planting Near

PotatoAromatic herbsMelons

Other Plants for Hilo

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 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 Sunflower 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

Growing Cucumber in Zone 12b

Cucumber (Cucumis sativus) is a popular garden vegetable. In Hilo, Hawaii, which is in USDA Hardiness Zone 12b, you should direct sow seeds around Thursday, November 20, 2025.

Your average last frost date is Thursday, January 1, 2026. Cucumber grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.