Growing Onions in Zone 9a: Timing, Varieties, and Tips for a Big Harvest

Onions are a staple in the Zone 9a garden—but timing and variety selection make all the difference. In this episode of The Compost Pile, hosts David Pool and Aaron Barnhill break down everything you need to know about successfully growing onions in our warm Southern climate.

We cover what makes short-day onions essential for Zone 9a, when to plant onions for the best bulb formation, and the differences between bulb onions, bunching onions, multiplying onions, and shallots. You’ll also learn best practices for growing onions in raised beds, proper spacing, fertilization, watering, and how to know when onions are ready to harvest. We wrap up with tips on curing and storing onions so your harvest lasts well beyond the growing season.

Whether you’re planting onions for the first time or looking to improve your yields, this episode is packed with practical, zone-specific advice for organic gardeners and homesteaders.