Calamagrostis x acutiflora ‘Overdam’ is a hybrid (C. arundinacea x C. epigejos) feather reed grass cultivar which is valued for its variegated foliage, early bloom, vertical lines and ability to grow in wet soils. It is a slowly-spreading, clump-forming, cool season ornamental grass which features a compact, erect, slightly arching, slender foliage clump of stiff, narrow leaves variegated with rich green and white stripes. Leaves eventually turn tan in winter. In June, tightly-vertical flower stalks rise above the foliage bearing narrow inflorescences of feathery, pinkish-green flowers which turn golden as the seeds mature in summer and eventually tan. The clumps provide good continuing winter interest – so we rarely cut it back. This cultivar is similar to Calamagrostis x acutiflora ‘Karl Foerster’ except ‘Overdam’ clumps are more compact and foliage is variegated.
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