Most people are familiar with the large clumps of lush, grass-like foliage and creamy white feathery plumes of pampas grass (though pink varieties are available too). Pampas grass (Cortaderia) is an attractive ornamental grass that is popular in many landscapes. While they're extremely easy to grow, however, it's important to know what you're getting into before planting pampas grass around the home. Don't be so quick to plant it simply because it looks good. It's actually a very fast grower and can become quite large, anywhere from 5 and 10 feet (1.5-3 m.) high and wide, and even invasive.