Read more: The Birds You Do Not Want To Be Seeing In Your Yard Many hummingbird-pollinated plants have long, tubular flowers that have evolved to accommodate how these birds feed. Penstemon flowers ...
Q: I am growing some penstemon plants (also known as beardtongue) in my backyard and they are blooming beautifully. However, some of the flowers have now passed their prime and are brown and wilted.