Cutting Penstemmon Stalk That Had Flowered

Question

Should I cut the stem which has already flowered so the lower stems can flower?

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Answer 1

Yes, you can remove spent flower stems. Here is more:

https://penstemons.org/index.php/cultivation/growing/59-pruning

https://www.gardeningknowhow.com/ornamental/flowers/penstemon/penstemon-beard-tongue.htm

https://www.rhs.org.uk/plants/penstemons/growing-guide