When to Plant Kale in San Jose, California (95151)
Location
San Jose, California
ZIP Code
95151
USDA Zone
9b
Last Frost
Wednesday, February 10, 2027
📅 Planting Calendar
Direct Sow Outdoors Wednesday, December 30, 2026
Pro Tip: Kale can be directly sown outdoors. Plant 6 weeks before your last frost date.
🌿 Plant Details
Scientific Name Brassica oleracea
Days to Maturity 55 days
Mature Height 18-24"
Spread 18"
Type Leaf
Fruit Size N/A
☀️ Growing Requirements
☀️
Sun
Full Sun to Partial Shade
💧
Water
Regular (1-1.5 inches/week)
↔️
Spacing
18" apart
🌱
Planting Depth
0.5" deep
Seeds typically germinate in 5-10 days
🤝 Good Companions
BeetCeleryCucumberDillOnion
⚠️ Avoid Planting Near
StrawberryTomato
Other Plants for San Jose
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 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
Growing Kale in Zone 9b
Kale (Brassica oleracea) is a popular garden vegetable. In San Jose, California, which is in USDA Hardiness Zone 9b, you should direct sow seeds around Wednesday, December 30, 2026.
Your average last frost date is Wednesday, February 10, 2027. Kale grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.