How to Fertilize Iris 'Thriller'?
Diluted iris feed every three to four weeks during spring bloom

Iris 'Thriller' · Iris 'Thriller'
Thrives in a sunny position, in neutral to slightly acid soil with good drainage. Plant rhizomes just above soil level, as sun on the rhizomes encourages flowering. See bearded iris cultivation
Diluted iris feed every three to four weeks during spring bloom