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Seed Selection and Harvest
acre agricultural Big bluestem Black-eyed Susans bottle gentians burn Canada thistle compass-plants crown vetch early emerging plants erosion established fire flowers foxtail germinate goldenrod grasses and forbs gray-headed coneflowers growing season herbicide Heritage Foundation Indian grass individuals Iowa Iowa Chapter Iowa Natural Heritage Iowa's lamb's quarters large numbers late Leopold Center little bluestem local-ecotype seed mower native prairie natural communities Natural Heritage Foundation Nature Conservancy number of species Nursery P.O. Box pale purple coneflower Pasque flowers percent Post-planting Mowing prairie plant communities Prairie Reconstruction prairie remnant Prairie Seed prairie species prior to planting produce purple coneflower purple prairie clover reed canary grass rigid goldenrod root system Roundup saw-toothed sunflowers seed harvested seed head seedlings seeds or plants smooth brome soil surface spring summer swales sweet clover switchgrass tall blazing-star tallgrass prairie tillage vegetation Vendor carries virgin prairie weed pressure weed-free weedy competition White wild indigo Wildflowers