A hand saw can also get the job done with less hassle. That is why getting the best hand saw for cutting trees will make pruning branches a lot easier. I have a bunch of different options to review ...
One is by spores, a sexual means of reproduction good for mass production. The second is asexually, by taking cuttings. Cuttings are great for species like the rabbit's foot fern that put out runners.
Penstemons are short-lived perennials that can suffer in winter. To avoid losses, pruning penstemon is best done in spring. It's also a good idea to take summer cuttings to prevent winter losses.