How to Fertilize iris 'Austrian Sky'?
Balanced bulb nutrition applied one time before spring sprouting

iris 'Austrian Sky' · Iris 'Austrian Sky'
Grow in well-drained, preferably neutral to alkaline soil in full sun but acid soils are tolerated if well-drained. Sun on the rhizomes will encourage flowering. See also bearded iris cultivation
Balanced bulb nutrition applied one time before spring sprouting