They appear in late summer and last for months. The minute flowers are silvery white to pink. Plants of Cortaderia selloana that are purchased in 1-gallon containers may take two or more years of growing before they begin to flower. If you planted a very young seedling and your plant looks healthy but is small, you must wait a couple of years for the plant to mature before it flowers. If your plant does not look healthy and robust, try changing your growing conditions.
Pampas grass grows on the high plains or pampas of South America.
Pampas grass requires full sun but will tolerate some light shade. The soil should be well-drained, and the plants will not tolerate wet locations particularly in the winter. The edge of your pond may be too wet. Plants should be well-watered and fertilized in the spring. Wear gloves and a long-sleeved shirt when working around the grass because the leaf edges are sharp.