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TL;DR

The nickname of beardtongue refers to the pollen-free stamen that protrudes from the flower, resembling a bearded iris. Penstemon plants have lance-shaped foliage and spikes of flowers.

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When Should I Prune My Beardtongue?

The beardtongue plants will naturally fall off up to the first part of spring, so do thepruning of your beardtongue plants anytime between the flowers naturally falling off up to the first part of spring. Pruning after the flowers fall off ensures that your beardtongue has completed its life cycle. [1]

What Does A Beardtongue Plant Look Like?

Penstemon plants have lance-shaped foliage and spikes of flowers. There are five flower colors: pink, red, white, purple and yellow. The nickname of beardtongue refers to the pollen-free stamen that protrudes from the flower, resembling a bearded iris. [2]

Do You Deadhead Beardtongue?

New growth emerges from the tips of the stalks. The production of fresh stem growth that will bloom again in late summer or early fall is encouraged by deadheading. The old flowers will die back as you prune them away. [3]

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How Do You Cut Back A Beardtongue?

Apart from the occasional watering, you won’t need to care for them at all. Cut off the entire stem of beardtongue flowers to encourage new flower growth. In case of heat waves or dry spells, water the base of the beardtongue plant in the evening. [5]

When Should You Cut Back Penstemon?

The best time to cut back penstemons is in the spring. If you notice new shoots beginning to appear during this time, it’s best to remove any old blossoms or foliage to encourage new growth. [6]

Should Penstemon Be Cut Back After Flowering?

It takes a long time to remove the flowers from a penstemon plant. As the main bloom ends, cutting back the whole plant is a quicker and simpler way of deadheading. Burpee says to cut back the flower stalks all the way to the ground. [7]

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Does Beardtongue Need Full Sun?

Light preference is full sun to part shade. When grown in direct sunlight, purple or reddish leaves will show the best foliage color. [8]

Will Beardtongue Spread?

Plants have a 1-2′ spread. Penstemon digitalis thrives in sunny sites with acid soil. Plants are tolerant of a number of factors, including clay loam, sand, alkaline ph, heat, and part sun and dry shade. [9]

Sources:

  1. https://www.gardenguides.com/75904-prune-beardtongue.html
  2. https://www.thespruce.com/penstemon-care-1316041
  3. https://homeguides.sfgate.com/beardtongue-bloom-89818.html
  4. https://www.nature-and-garden.com/gardening/beardtongue.html
  5. https://horticulture.co.uk/penstemon/
  6. https://homeguides.sfgate.com/cut-back-penstemon-24819.html
  7. https://www.gardendesign.com/perennials/penstemon.html
  8. http://www.newmoonnursery.com/plant/Penstemon-digitalis

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