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Onyx and Pearls Beardtongue

$29.99
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$29.99
  • Full Sun (At Least 6 Hours Of Direct Sunlight)
  • Height 3.5 Feet
  • Width 38 - 42 Inches
  • Growing Zones 3-8

A hardy improved hybrid of a native North American wildflower, Onyx and Pearls is a striking medium to large upright perennial. A play on words, the name Onyx and Pearls refers to gemstones in dark and light colors. The foliage is a dark, nearly black stem and leaves, and the flowers are a white/lavender blush, held above the foliage. The contrast in the colors makes a lovely display in your summer garden. Nicknamed Beardtongue due to its stamen that protrudes out of the throat of the three lobed lip, Penstemon has been a sought after perennial for informal gardens for decades. Bees, butterflies and hummingbirds will be frequent visitors to your lovely perennials.

Native to North America, and one of the cold hardiest perennial flowers, Penstemon is hardy to Zones 3-8. Related to snapdragons and foxgloves, Penstemon are a part of the plantain family. There are about 250 species of native Penstemon across North America and many more hybrid cultivars exist. Once you grow a Penstemon in your perennial garden, you may find yourself seeking out more varieties as they quickly become a favorite flower and there are so many different colors and forms available.

Onyx and Pearls Beardtongue Care

With their reputed cold hardiness, able to take sub zero winter conditions, Penstemon is an easy to care for perennial. Preferring average to fertile garden soil with a pH range of 5.8 to 6.2, Penstemon will grow in just about any well drained soil. They are drought tolerant once established and make an excellent addition to a xeriscape garden. Coastal gardeners will be pleased to learn they are also salt tolerant, growing well in the sandy soil typically found along the East Coast of the United States. Heat tolerant to Zone 8, Penstemon does require the cold winters to reenergize the plant for the next season. Deer are not typically drawn to it. Plant in full sun for best flowering. Fertilizer is generally not needed, but a light application of well composted organic material may be applied to feed particularly poor soils.

Deadheading is not required for good bloom production, but will enhance the creation of new flowers. Remove the flower head just below the first set of leaves. While pruning is generally not needed, you may pinch back a leggy stem to create a more compact plant. Prune any dead or diseased stems right to the ground, and when the plant ceases its growth for the season and goes dormant, prune back to about â…“ of the plants volume, especially in harsh winter zones that will require mulching to protect the root zones.

Onyx and Pearls Beardtongue Spacing

Space your plants about 38 to 42 inches apart for good air circulation. This is a tall and wide plant, maturing at about 42 inches tall and 42 inches wide. It makes a great companion to low growing mounding perennials in cool and warm colors. Some great companion plants are Russian Sage, Salvias, Dianthus, and other bright colored perennials and annuals that will look great in contrast to the dark dramatic foliage of Onyx and Pearls Beardtongue. Whether massed out in a full sun landscape border, or as a companion plant of medium to large size in your garden bed, you will enjoy the spectacular contrast of Onyx and Pearls in your garden this spring.

Onyx and Pearls Beardtongue Information

USDA Hardiness Zones: 3-8
Plant Type: Perennial
Sunlight Exposure: Full Sun
Mature Height: 3.5 Feet
Mature Width: 38 - 42 Inches
Plant Spacing: 3 - 3.5 Feet
Growth Habit: Upright
Flower Color(s): Pink, White
Flower Shade: Pink Shades/White Shades
Seasonal Interest: Early Summer
Foliage Type: Herbaceous
Foliage Color(s): Near Black
Attracts: Bees, Hummingbirds
Tolerates: Drought, Salt
Features: Attracts Pollinators, Cut Flowers, Foliage Interest, Low Maintenance, Native to North America
Uses: Border Plant Cut Flower Mass Planting
Plant Brand: Proven Winners
Botanical/Scientific Name: Penstemon hybrid 'Onyx and Pearls'

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Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.

For information on how to care for you new plant please check out our guide. Guide: How to Care for Your New Plant(s)

Plant Addicts Warranty - 1 Year (Extra Purchase Required)

We encourage all plant lovers to purchase the Plant Addicts Warranty whether you’re new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

Guide: How to Care for Your New Plant(s)

Planter Shipping

Standard Colors: 2-3 business days

Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice

Please Note: On special orders there can not be any cancellations

Plant Shipping

Time of Order:

Summer Shipping

  • If there is extreme heat we’ll delay shipping.  
    • We’ll have to review what areas the plants are traveling through along with your location


Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.

It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.