Here is a perfect mix for your CP23 or 23a mix also CP28 Wetlands. This 23 species mix has 30 grass seeds and 10 forb seeds per square foot. This mix should be used on sites that do not flood every year. On CP23 sites- use this mix on the portion of the field that is less prone to flood.
Includes (#s/ac): Bluestem, Big (VNS) (2.178), Fowl Bluegrass (0.126), Sedge, Fox (0.218), Wildrye, Virginia (cool season) (2.269), Marsh Muhly (Upland Timothy) (0.017), Switchgrass (VNS) (0.778), Milkvetch, Canada (0.016), Milkweed, Swamp (Marsh) (0.028), Wild Bergamot (0.008), Rattlesnake Master (0.018), Boneset, Common (0.002), Prairie Cinquefoil (0.012), Wild quinine (Feverview) (0.019), Nodding Bur Marigold (0.013), Winged Loosestrife (0.002), Coneflower, Grayheaded (Yellow) (0.091), Susan, Black-eyed (0.056), Susan, Sweet black-eyed (Sweet, Fragrant Coneflower) (0.003), Cup Plant (0.019), Showy Goldenrod (0.003), Square-stemmed Monkeyflower (0.002), Culver's Root (0.005), Alexander, Golden (0.025).
Click on PDF below to view mix in the IA Seed Calculator