The warm, mild winters in South Texas allow the harvesting of Sweet Onions to begin as early as March. TX1015 Sweet Onions grow from March through June in the Deep South of Texas (Rio Grande Valley) and from May through July in South Central Texas (Uvalde/Winter Garden).
This sweet kickoff signals the start of domestic onions in the U.S., one that many set their calendars by. Late winter to early summer sees an opportunity to add Texas flavor like no other with a signature variety whose planting time has made it into its name—1015.
Sources: The Snack
If you’ve purchased your Sweet Onions and plan on using them within the week, you can leave them out on the counter, otherwise, follow these simple tips for long-term storage.
If storing in the refrigerator, wrap each bulb individually in a paper towel and place them in the crisper with the vents closed.
Texas Sweet Onions can be preserved if stored in a cool dry place with good air circulation. Get a pair of clean pantyhose, put one onion in each leg and tie a knot above the onion. Keep adding onions until each leg is full. As you need onions, simply cut the sections you require for your recipe!
Do not store onions with potatoes; the onions will go bad quicker.