How to Fertilize Sarawschan allium?
Monthly diluted potassium-rich feed from spring until flower fading

Sarawschan allium · Allium sarawschanicum
Grow in full sun and fertile well-drained soil. It is best to grow in containers where garden soil is heavy clay and prone to saturation over winter. See allium cultivation
Monthly diluted potassium-rich feed from spring until flower fading