Evergreen White Bunching Onions are very hardy, so you can plant them outdoors in early Spring when the temperature is at least 50 degrees or warmer. This high-quality variety grows quickly and easily with just one inch of water required per week. Evergreen White Bunching Onions can be harvested at several stages of growth. Prepare the green stalks of very young plants like you would chives. Harvest mature stalks from 60 days through up to 120 days. Restart a cutting of the root end that’s one inch or longer by simply placing it in the soil.