How to Fertilize Siberian iris 'Simple Gifts'?
Diluted iris feed every three to four weeks during spring bloom

Siberian iris 'Simple Gifts' · Iris 'Simple Gifts'
Grow in any good garden soil that is preferably moist but not waterlogged; in drier soils, dig in well-rotted organic matter before planting then apply as a mulch each spring
Diluted iris feed every three to four weeks during spring bloom