Answer: Cortaderia selloana grows very easily in most conditions. It takes full sun and tolerates a wide variety of soil moistures from dry to wet. However, note that it spreads its seeds widely and they germinate readily wherever they land. It has become a nuisance plant in some areas, such as California's coast. Make sure you don't get Cortaderia jubata, a relative of pampas grass that is even worse: it seeds freely and crowds out native plants. Jubata has fewer and smaller plumes than pampas grass (selloana).
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