<https://www.backyardgardener.com/plantname/penstemon-heterophyllus-blue-of-zurich-penstemon/>
<http://schema.org/description>
"This short-lived perennial, often treated as an annual in colder climates, is grown primarily for it's pretty, tubular, two-lipped flowers (all colors but"
<https://www.backyardgardener.com/plantname/penstemon-heterophyllus-blue-of-zurich-penstemon/>