Egyptian walking onions, also known as top-setting onions or tree onions, are a unique and fascinating addition to any UK garden. These perennial plants not only produce traditional onion bulbs but also form aerial bulbils that “walk” and can be replanted to propagate new plants. Harvesting these onions involves understanding the growth patterns of both the underground bulbs and the aerial bulbils. In this article, we’ll explore when and how to harvest Egyptian walking onions in the UK to make the most of their distinct characteristics.
Understanding the Growth Cycle:
Egyptian walking onions exhibit a distinctive growth cycle that sets them apart from conventional onions. They form clusters of small bulbs at the top of their stems in late spring, often referred to as “topsets” or “bulbils.” These bulbils eventually mature and become heavy, causing the stems to bend and touch the ground. This bending action allows the bulbils to establish roots and grow new plants.
When to Harvest Egyptian Walking Onions:
1. Harvesting Bulbils for Propagation: In the UK, the best time to harvest the bulbils for propagation is in late summer or early autumn, usually around August to September. Once the bulbils have matured and the stems start bending, you can gently detach the bulbils from the stem and plant them in the desired location.
2. Harvesting Underground Bulbs: If you’re interested in harvesting the underground onion bulbs, you can do so in late summer, around August to September, when the foliage starts to die back. The bulbs will be smaller than traditional onions, but they still offer a distinct flavour.
Harvesting Technique:
1. Bulbils: To harvest the bulbils, gently bend the stem down until the bulbils touch the ground. Allow them to establish roots for a few days before carefully detaching them from the stem. Plant them where you want to grow new onion plants.
2. Underground Bulbs: To harvest the underground bulbs, gently loosen the soil around the base of the plant using a garden fork. Lift the bulbs from the soil, brushing off excess dirt, and trim the foliage.
Storage and Usage
1. Bulbils: If you’re harvesting bulbils for propagation, plant them immediately in well-draining soil. Keep them watered until they establish themselves and start growing.
2. Underground Bulbs: After harvesting, cure the bulbs by placing them in a dry, well-ventilated area with good air circulation. Once they’re dry, you can store them in a cool, dry, and dark location. Use the bulbs in cooking just like you would with traditional onions.
Final Thoughts:
Harvesting Egyptian walking onions in the UK is a rewarding endeavour that allows you to enjoy their unique growth patterns and flavours. By understanding the right timing and techniques for harvesting both the bulbils and the underground bulbs, you can make the most of these versatile and intriguing plants. Whether you’re propagating new onion plants or adding a distinct taste to your culinary creations, the process of harvesting Egyptian walking onions adds a touch of gardening wonder to your UK garden.