Calamagrostis 39karl foerster39 is an easy to grow towering ornamental grass that is suitable for mixed borders the leaves arch gracefully but the real stand out featurs are the bronze coloured feathery panicles that can reach up to 18 metres high during the summer you can rely on calamagrostis to burst into growth quickly each spring and because of it39s height it could be used as a light and airy screen height 18m 40593941 spread 50cm 40193441