How to Fertilize Dalen's gladiolus?
Balanced perennial feed every four weeks from spring through summer

Dalen's gladiolus · Gladiolus dalenii
Also known as: dragon's head sword lily; maid of the mist; prim
Grow in a sunny, sheltered position. Plant 10 to 16cm deep on a bed of sharp sand in fertile, well-drained soil. Lift when foliage dies back, discard old corms and store new corms in a dry frost-free place until planting in the spring. In milder areas a thick dry winter mulch may be sufficient to prevent frost damage
Balanced perennial feed every four weeks from spring through summer