Depending on the area in which you live, you may have to dig up and store bulbs to ensure that they aren't damaged during winter's harsh temperatures. Not all bulbs will need to be removed from the ground and stored during the winter but those that are more sensitive to cold temperatures may benefit from such action. Bulbs vary when it comes to their needs but there are general rules you can follow when dealing with them. Whether you have extra bulbs you have yet to plant or you have bulbs that you are digging up from the ground, they will need to be stored in the same type of environment so that they do not dry out during the winter.
Bulbs dug up from the ground will need to be removed gently from the ground without the main bulb or its food structures being damaged. Gently clean away the soil with water. Afterwards, they should be left to dry away from sun and wind. They should not be subjected to extreme temperatures, whether hot or cold. They should be left to dry for two days. Afterwards, they should be ready to be stored. Before storing, sort and remove the deformed and diseased bulbs. Once you have selected the ones you will be saving, remove the stems and any foliage. Bulbs will benefit with a pesticide and/or fungicide powder, though it isn't necessary. It is important that you label the bulbs before putting them away, as it is difficult to identify them based on their appearance alone. Never store them in plastic container or bags but paper bags instead. They will need to have excellent ventilation to last through the winter. When placing in containers, include a storage medium, such as peat moss, and don't allow the bulbs to touch each other. Keep in a cool, dry area that is constantly 50 degrees.