Planting too shallow (plug above soil line) will promote excessive drying and wilting despite a moist environment. Penstemon are upright plants, and planting too shallow can also cause some problems with plant stability. ... We have noticed that some penstemon are prone to high pH and iron deficiency.

Why is my penstemon falling over?

Pruning Penstemon Plants

Leaving the dead growth in place for too long will allow it to droop over, which can damage surrounding plants. ... Cleaning the shears before and after each use and keeping the blades honed will help keep garden plants healthy and free from damage.

How often do you water penstemons?

Penstemons tolerate drought, but 1 inch of water per week in the summer will keep plants vigorous and promote better blooming.