When to Plant Sweet Corn in College Springs, Iowa (51637)
Location
College Springs, Iowa
ZIP Code
51637
USDA Zone
5b
Last Frost
Saturday, April 25, 2026
📅 Planting Calendar
Direct Sow Outdoors Saturday, March 14, 2026
Pro Tip: Sweet Corn can be directly sown outdoors. Plant 6 weeks before your last frost date.
🌿 Plant Details
Scientific Name Zea mays
Days to Maturity 7 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 1-7 days
Other Plants for College Springs
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 Potato Swiss Chard Tomato Turnip Watermelon Zucchini
Growing Sweet Corn in Zone 5b
Sweet Corn (Zea mays) is a popular garden vegetable. In College Springs, Iowa, which is in USDA Hardiness Zone 5b, you should direct sow seeds around Saturday, March 14, 2026.
Your average last frost date is Saturday, April 25, 2026. Sweet Corn grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.