Penstemon cobaea v. purpurea

Purple Ozark Beardtongue

Ozark Purple Beardtongue is a magnificent beardtongue with its huge lavender-blue flowers and glossy deep green foliage. Blooming in early summer with nectar-rich flowers, this perennial is a favorite of the bumblebees. Drought resistant/drought tolerant plant (xeric).
Zones 5 - 8
Advantages
Deer Resistant
Attract Butterflies
Bee Friendly
Rabbit Resistant
Light Requirements
Full Sun
Annual Rainfall 10 to 20", 20 to 30", 30 to 40" (with care)
Mature Plant Size 18-30" tall , 15-18" wide
Bloom TimeLate spring to late summer
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Size No
SKU75732

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

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$8.99
Per No
Out of stock
SKU
75732

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Details
18-30" tall x 15-18" wide. Magnificent is barely adequate to describe this richly colored Penstemon. A rare variety from southern Missouri Ozarks, this native plant treasure is seldom seen in garden cultivation. Blooming in early summer, the spikes of large, lavender-purple flowers push up from rosettes of large, glossy, deep green leaves (that are as ornamental as the flowers). Bumblebees adore this plant and actually fit into these oversized flowers when pollinating them!
More Information
SKU
75732
Ships To Canada
No
Common Name
Purple Ozark Beardtongue
Botanical Name
Penstemon cobaea v. purpurea
Zones
5, 6, 7, 8
Light Requirements
Full Sun
Mature Height
18-30" tall
Mature Spread
15-18" wide
Bloom Time
Late Spring - Early Summer, Early - Mid Summer, Mid - Late Summer
Bloom Time
Late spring to late summer
Ships As
Potted Plant
Planting Time
Spring / Summer, Fall
Soil Type
Sandy Soil, Average Soil
Soil Moisture
Drought Resistant / Waterwise
Amount Of Rain
10 to 20", 20 to 30", 30 to 40" (with care)
Advantages
Deer Resistant, Attract Butterflies, Bee Friendly, Rabbit Resistant
Special Groups
High Country Gardens Introduction
Ideal Region
Anywhere In The US
Neonicotinoid Free
Yes - Learn More
Planting Guides

Tips for growing Penstemon (Beardtongue)

Penstemon are generally evergreen and have beautiful flowers that are very attractive to hummingbirds. Most varieties are rabbit resistant.

  1. They need “elbow room,” maximum sun, heat and don’t like to be crowded by other plants.
  2. Plant only in well-drained soils; clay soils and Penstemon are incompatible.
  3. Avoid overly enriched soils; too much compost and fertilizer will shorten their lifespan.
  4. They establish quickly and the amount and frequency of watering needs to be reduced after about 8 to 10 weeks to create dry conditions.
  5. When using drip irrigation, be sure to put the emitter off to the side of the plant, not right on top of the root ball to avoid overwatering the plant.
  6. Plant high, leaving the top of the rootball just above the surrounding soil to avoid burying the crown of the plant.
  7. Mulch with gravel or pine needles in arid climates. No mulch is needed where conditions are moister. Always avoid bark, grass clippings, or compost as mulch materials.
  8. Allow some of the plants to set seed (don't deadhead all of the flower spikes)*.
  9. Fertilize sparingly. One time each year in the fall is enough. Apply a light application of an organic or natural fertilizer such as Yum Yum Mix as a top dressing around the plants. Don't use high nitrogen water soluble fertilizer like Miracle Gro

*To keep penstemon that have finely textured or matted evergreen foliage looking their best, you'll want to 'deadhead" them. Shear off the fading flowering spikes just as the plant is going out of flower. Gently bunch the flower spikes together with one hand and cut them off at the point where they go down into the mat of foliage with your clipper in your other hand. Recommended for the following varieties: P. pinifolius types (‘Compactum', ‘Mersea Yellow', ‘Nearly Red', ‘Magdalena Sunshine' and ‘Tall Orange Mix'), as well as Penstemon linarioides v. coloradensis and Penstemon virens ('Blue Lips').

More in-depth guidance for growing Penstemon: Watch our video: How To Plant Penstemon or read articles: Growing Penstemon, Penstemon for the Waterwise Garden, David’s Favorite Plants: Pineleaf Beardtongue, The Beardtongue Family: Penstemania for Penstemon and The Genus Penstemon: The Royalty of American Wildflowers The Genus Penstemon: The Royalty of American Wildflowers (Part 2).


View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
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