Exposure Prefers full sun for optimal performance, may still bloom in half-day shade
Fertilizer Prefers rich conditions on organic soils.
Hardiness Zones 4-8 for most varieties, Some Japanese cultivars tolerate colder, others tolerate warmer zones (please comment in comment box with your location if this cultivar grows well in zone 3, 4, 9, or 10.)
PH Prefers Acid solis 6.1 to 7.0, intolerant of limy soils
Water: Prefers well drained but moist good garden soil, More tolerant of dry conditions in established plants, Needs swampy conditions especially in Spring bloom season.