In Zone 8b, gardeners have the advantage of being able to grow a variety of onions. However, when it comes to bulbing onions, it is important to choose short-day varieties that are suitable for this region. Some of the best onions to grow in Zone 8b include ‘Grano’, ‘Granex’, and various hybrids such as ‘Texas SuperSweet’ and ‘Burgundy’.
One option for growing these onions is to start them from seed in the fall. This allows the onions to establish themselves during the cooler months and develop strong roots before the arrival of warmer weather. Starting onions from seed also gives gardeners a wider selection of varieties to choose from.
When planting onions from seed, it is important to start them indoors or in a greenhouse about 8-10 weeks before the last frost date. This will give the onions enough time to develop before being transplanted into the garden. The seeds can be sown in flats or individual pots, and should be kept in a warm, well-lit area until they germinate.
Once the seedlings are around 4-6 inches tall and have a few sets of leaves, they can be transplanted into the garden. It is best to choose a location that receives full sun and has well-drained soil. Onions prefer loose, fertile soil, so incorporating compost or well-rotted manure before planting can be beneficial.
When transplanting the seedlings, make sure to space them about 4-6 inches apart to allow for proper bulb development. Gently separate the seedlings and plant them at the same depth they were growing in the containers. Water the transplants thoroughly after planting to help them settle in.
If starting onions from seed seems like a daunting task, transplants can also be purchased and set out in the garden in January. This can save time and ensure a more consistent crop. Look for short-day onion transplants at local nurseries or garden centers.
Once the onions are planted, it is important to provide them with proper care throughout the growing season. Onions require consistent moisture, so watering deeply and regularly is essential. However, be careful not to overwater, as onions do not like to sit in soggy soil.
Weeds should be controlled to prevent competition for nutrients and water. Applying a layer of mulch around the onion plants can help suppress weeds and conserve moisture. Additionally, fertilizing the onions every few weeks with a balanced fertilizer can promote healthy growth.
Harvesting onions can be done when the tops start to turn yellow and fall over. Gently lift the onions out of the soil and allow them to dry in a well-ventilated area for a week or two. Once the onions have dried, they can be stored in a cool, dry place for several months.
For gardeners in Zone 8b, short-day bulbing onions like ‘Grano’, ‘Granex’, ‘Texas SuperSweet’, and ‘Burgundy’ are excellent choices. Whether starting from seed in the fall or setting out transplants in January, these onions can thrive in the mild climate of this region. With proper care and attention, gardeners can enjoy a bountiful harvest of delicious onions.
