Penstemon strictus

Rocky Mountain Beardtongue

Rocky Mountain beardtongue, with its spikes of bright blue flowers and evergreen foliage, is one of the easiest-to-grow Penstemon. Long-lived, this beauty thrives in most any well-drained soil with full sun exposure. Drought resistant/drought tolerant plant (xeric).
Zones 4 - 9
Advantages
Attract Hummingbirds
Attract Birds
Bee Friendly
Rabbit Resistant
Native
Evergreen
Low Maintenance
Multiplies / Naturalizes
Light Requirements
Full Sun
Annual Rainfall 10 to 20", 20 to 30", 30 to 40" (with care)
Mature Plant Size 24-30" tall , 36" wide
Bloom TimeMid to late spring
Shipping Shipping begins the week of February 25th, 2019 Learn More…
Size Plant - 5" Pot
SKUHC014672

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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Regular Price $9.99 Special Price $7.99
Per Plant - 5" Pot
You save: 21%
In stock
SKU
HC014672

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Details
24" tall x 36" wide (seed propagated). A native beardtongue of the foothills and mountains of the southern Rockies, this plant grows easily over a wide range of the western U.S. The tall showy spikes of intense blue-purple flowers last for over a month in late spring. Spreading steadily via stolons to form large clumps, Penstemon strictus is one of the longest-lived, most easily grown of the Penstemons. A real show stopper! Cut off flowering spikes after bloom; leave a few if reseeding is desirable.
More Information
SKU
HC014672
Ships To Canada
No
Common Name
Rocky Mountain Beardtongue
Botanical Name
Penstemon strictus
Zones
4, 5, 6, 7, 8, 9
Light Requirements
Full Sun
Flower Color
Blue
Height
30 inches
Mature Height
24-30" tall
Mature Spread
36" wide
Bloom Time
Mid - Late Spring
Bloom Time
Mid to late spring
Ships As
Potted Plant
Evergreen Foliage
Yes
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
Attract Hummingbirds, Attract Birds, Bee Friendly, Rabbit Resistant, Native, Evergreen, Low Maintenance, Multiplies / Naturalizes
Ideal Region
West, Western Only, Southwest, Suitable Above 7000 ft
Native To
North America
Item Package Size
Plant - 5" Pot
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.
Shipping
ZoneShipping Status
Zone 2Shipping begins the week of May 20th, 2019
Zone 3Shipping begins the week of May 20th, 2019
Zone 4Shipping begins the week of May 20th, 2019
Zone 5Shipping begins the week of April 29th, 2019
Zone 6Shipping begins the week of April 15th, 2019
Zone 7Shipping begins the week of March 25th, 2019
Zone 8Shipping begins the week of March 4th, 2019
Zone 9Shipping begins the week of February 25th, 2019
Zone 10Shipping begins the week of February 25th, 2019
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