Yellow crocus bulbs flower in March/April time, with large yellow flowers. They grow to around 10cm high. Crocus will grow in a wide range of soils provided there is good drainage. They like sunshine but the flowers will last longer in partial shade. Excellent for naturalising (leaving in for flowers year after year). Suitable for rockeries, between shrubs and in any kind of container. Should there become overcrowding after a few years, lift when the foliage has died down divide and replant.