Tree onion
How to Grow Tree onion
Overview
Tree onions, also known as topsetting or walking onions, are a unique and versatile addition to any garden. These perennial alliums produce a cluster of bulblets where flowers would typically appear on other onion varieties. Easy to grow and care for organically, tree onions offer both a delicious harvest and the potential for propagation.
Growing Conditions
Tree onions thrive in well-draining soil with full sun exposure. They prefer a neutral to slightly acidic pH range (6.0-7.0) and can tolerate a wide variety of climates. These hardy plants are drought-tolerant once established and require minimal watering, making them an ideal choice for both novice and experienced gardeners.
Planting & Care
Plant tree onion bulbs in the spring, about 1 inch deep and 6 inches apart. As they grow, allow plenty of space between plants to accommodate the formation of bulblets at the top. Water lightly during dry spells, but avoid overwatering as this can lead to rot. Fertilize with compost or well-rotted manure in the spring for optimal growth.
Common Problems
Tree onions are generally low-maintenance and resistant to most common garden pests. However, they may occasionally suffer from onion fly infestations or fungal diseases if grown in overly wet conditions. Keep an eye out for signs of trouble, but don't be discouraged – these issues can usually be resolved with proper care.
Harvest or Enjoy
Tree onions are ready for harvest when the tops begin to fall over and the bulblets appear brown and dry, typically 3-4 months after planting. Use a spade to carefully dig up the entire plant, then shake off the soil and trim away any excess roots. Store your harvested tree onions in a cool, dry place like a cellar or pantry for up to 6 months.
In addition to their culinary uses, tree onions are also an excellent source of propagation material. Simply allow the bulblets to mature on the plant, then transplant them into your garden or share with friends and neighbors. With