Pink Rain Lily

Zephyranthes rosea, the Pink Rain Lily, answers rain rather than the calendar. A few days after a soaking, this small bulb of 0.15 to 0.25 metres throws up bright rose-pink crocus-like flowers above narrow grass-like leaves.
Planted in drifts along edges and beneath trees, it turns an irrigation cycle into a flowering event, and it naturalises steadily once left alone.
The Pink Rain Lily is a low-cost, self-sustaining edge plant that flowers on its own schedule and asks for nothing between times.