Penstemon are grown from seeds. Sow Penstemon seeds directly into your flower garden after all danger of frost has past and the soil has warmed. Or, start them indoors. Place these small seeds at the top of the loose soil, and water lightly into the soil.
How to Sow Penstemon: Best sown indoors at alternating temperatures of 55 and 75° Expect germination in 10-15 days for P.
Take penstemon cuttings from late summer to early autumn. Select soft growth without a flower. Cut each cutting back to below a leaf joint and remove the lower leaves. More than one cutting can be put into a pot of cutting compost as long as the leaves don't touch.
I did a completely non-scientific experiment with penstemon cuttings. I put some in soil and some in water. The water ones have rooted and the soil ones look sad.. . . . .364011234887!]0000000000000009783314147222!]
