Once planted in place, the bulbs should get sufficient moisture from rain. But, in dry periods over summer it’s ideal to water them. When the foliage has turned yellow and died back, the foliage can be cut back.
When flowering is finished, the blooms can be deadheaded. Alternatively, leave a few flowers on the plants to save the seeds. These seeds can be sown in a seed tray and left to germinate. Once sown, these plants can take around 3 years to flower.