Some varieties, like Penstemon digitalis, will also grow in wet soil ... Sowing seeds outside in the fall or early winter will let these plants grow naturally. Dig a small hole to plant the ...
Purple coneflower (Echinacea purpurea) being visited by bumble bees. Purple coneflower (Echinacea purpurea). Foxglove beardtongue (Penstemon digitalis). University of Illinois Pollinatarium ...
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