Their tubular flowers may be ​​white, yellow, blue, purple, or red.
There’s great variety among penstemon species—some are only inches tall, while others stretch feet into the air. Their tubular flowers may be ​​white, yellow, blue, purple, or red. These can be fairly hardy plants, as they appreciate well-drained soil while also being able to withstand dry conditions. Penstemons might be relatively short-lived (three to four years), but they propagate easily and attract butterflies and bees.