Answer: Autumn crocus isn't a crocus at all, but an interesting plant with crocus-type flowers. The corms, if planted now, will produce long, broad leaves in the spring which will die back by summer. In the autumn a flower cluster will arise from seemingly nowhere. You can plant the corms, tips up, in 3"-4" of soil, in a sunny site. It isn't necessary to dig the corms up. In fact, they bloom better if left undisturbed for several seasons. The corms can be divided every 3-4 years, during their dormant season (July-August).
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