Crocus bulbs are fairly unfussy, and can handle low-quality or sandy soil if it's amended with a bit of organic material, like compost. Work in a compost before planting. Although crocus are easy to grow, they cannot tolerate too much water. Standing water in the garden is a recipe for rotted bulbs, so make sure to choose a well-draining location for crocus plants! For crocuses planted in containers, use potting soil for the best drainage and flowering results.