How to Water long-flowered crocus?
Moist soil during active growth, reduce watering after foliage declines

long-flowered crocus · Crocus longiflorus
Grow in a bulb frame or alpine house in a mix of equal parts loam, leaf mould and sharp sand or grit. Water freely in the growing season and apply a low-nitrogen fertiliser monthly. Keep completely dry in summer dormancy
Moist soil during active growth, reduce watering after foliage declines