Growing & Maintenance Tips for Pennisetum setaceum 'Rubrum'
Rubrum is a warm-season grass. Where temperatures get colder than 20 degrees F, the plants should be treated as annuals. Their major growth and flowering happens when the weather is hot. They will usually turn shades of brown for the winter. Once the grass turns brown it can either be removed immediately or you can leave the dried grasses and seed heads in your garden for winter interest. Snow or ice encrusted ornamental grasses can be quite beautiful.