Feather reed grass Calamagrostis 'Overdam' green-cream - Hardy plantStraight, upright ornamental grass. With cream coloured blades. Feather reed grass 'Overdam' (Calamagrostis acutiflora) is beautifully ornamental! The ornamental grass can grow up to 1. 2 metres tall. The ideal plant for a grass border. The 'Overdam' also looks lovely in a large flowerpot. The feather reed grass can be planted all year round. Provided temperatures don't go below freezing. The plant flowers in the summer. The plant does not require