Answer: These are usually lifted in the fall after frost and then sorted by size. They would be stored for the winter and then replanted in the spring. If you replant at weekly or ten day intervals you can extend the blooming season for your glads.
The largest corms will bloom the best, the cormels (little ones) may not be strong enough to bloom for another year or two. Some gardeners just save the larger ones, some replant all of them.
I would not lift them once they have already begun to grow in the spring as this will disturb their roots and could set them back.
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