How to Fertilize aril iris?
Diluted iris bulb feed every three to four weeks spring blooming season

aril iris · Iris hoogiana
Also known as: regalia iris
It can be difficult to grow in a garden situation as it comes from areas with dry, cold winters, dry summers and wet spring. Though hardy, wet winters encourage growth that is prone to cold damage. Outdoors grow in very well-drained soil in full sun. Best grown in a bulb frame in containers using gritty, free-draining compost, keep dry during the summer
Diluted iris bulb feed every three to four weeks spring blooming season