Most species bloom during May and June in the mid-latitudes of the United States, June in the northern states, and July in Canada. Some species bloom in Mexico in August! Thus they fill a temporal gap in the bloom of the border between the great displays of spring and the beginning of the midsummer phloxes and daylilies. Many penstemons are also fine for flower arrangements, with a single spray often making a bouquet in itself.
More than a hundred species have been grown by members of the American Penstemon Society, from the most common to a few of the rarest. There are still a great many species that have not been grown at all, and others that have only briefly been in cultivation. Penstemons offer a large field for experimentation and discovery for those who like to explore and expand the range of possibilities for our gardens.
The search box below can be used to search this website for information about a particular species.
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