When to Plant Radish in Elk Horn, Iowa (51531)
Location
Elk Horn, Iowa
ZIP Code
51531
USDA Zone
5a
Last Frost
Sunday, May 10, 2026
📅 Planting Calendar
Direct Sow Outdoors Sunday, March 29, 2026
Pro Tip: Radish can be directly sown outdoors. Plant 6 weeks before your last frost date.
🌿 Plant Details
Scientific Name Rhaphanus sativus
Days to Maturity 25 days
Mature Height 6-12"
Spread 3"
Type Root
Fruit Size Small (1-2 inches)
☀️ Growing Requirements
☀️
Sun
Full Sun to Partial Shade
💧
Water
Regular (keep moist)
↔️
Spacing
2" apart
🌱
Planting Depth
0.5" deep
Seeds typically germinate in 3-7 days
🤝 Good Companions
CarrotLettucePeaCucumberSpinach
⚠️ Avoid Planting Near
Hyssop
Other Plants for Elk Horn
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 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 Radish in Zone 5a
Radish (Rhaphanus sativus) is a popular garden vegetable. In Elk Horn, Iowa, which is in USDA Hardiness Zone 5a, you should direct sow seeds around Sunday, March 29, 2026.
Your average last frost date is Sunday, May 10, 2026. Radish grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.