Landscaping in Dry Shade

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    Landscaping in Dry Shade: 15 great landscape plants for dry shady areas

     

    Helen Muntz, Extension Educator, Utah State University 
    Larry Rupp, Extension Landscape Horticulture Specialist, Utah State University

     March 2018 | Horticulture/Lanscape/2018-01pr

     

    Finding the right landscape plants for dry areas that are also shady can be challenging. Most of the drought tolerant plants used in Utah’s residential and commercial landscapes come from dry environments and are adapted to full sun. Therefore, these plants do not grow well in shaded environments.

    Shade produces a microclimate with unique cooling effects, reduced soil evaporation and reduced plant transpiration (Lin & Lin, 2010). In spite of the common perception that shade gardens are always cool and moist, often there is not ample soil moisture.

    Often the very conditions that create shade can reduce soil moisture. For example, the soil beneath the canopy of a mature blue spruce is heavily shaded; however, between the canopy’s ability to shed snow and water to the drip zone and the water demand of the tree itself, the soil immediately underneath the tree can be very dry. This is especially true in Utah where high elevation and low humidity increases solar radiation and transpiration from the very canopy that may be creating the shade (Mee, et al., 2003).

    Typically, shade plants have developed certain traits such as thin, shade adapted leaves that are less adapted to resist water loss. On the other hand, adaptive traits of most drought tolerant plants to full sun, such as small pubescent or thick succulent leaves, reduce their ability to grow in a shaded environment. The end result is a paradox where the adaptations which make a plant shade tolerant may also make it drought intolerant and the adaptations that make a plant drought tolerant may also make it shade intolerant.

    The challenge to gardeners is to find plants that are tolerant of both shade and drought. In spite of the challenges of dry shade, there are a number of plants that can perform well in such an environment. Utah State University Extension compiled a list of plants that grow in dry shade. The list was sent in survey form to the Utah Public Garden Network to verify excellent performance of these plants when grown in dry shade. The following is a list of 15 plants that perform well in dry shade areas.

    Top 15 Plants for Dry Shade

    Key to Symbols

     


     

    1. Alchemilla mollis / Lady's Mantle

    Ladies mantle Lady’s mantle is a medium-sized, mounding perennial hardy to zone 3. It grows 1-1 ½ feet tall and 1 ½-2 ½ feet wide, with lime green, medium- large leaves. Lady’s mantle produces chartreuse flower clusters in June. Its flowers are good for cut or dried floral arrangements.

    Ladies mantle bloom chart

    2. Aquilegia / Columbine

    Columbine There are numerous species and varieties of columbine. They generally grow about 2 feet tall and 1 foot wide, and are hardy to zone 3. Columbine have light green, fernlike foliage and produce drooping flowers attractive to hummingbirds. Columbine cultivars are available in a variety of colors from whites, yellows, blues, and reds to bicolored.

    Columbine bloom chart

    3. Mahonia repens / Creeping Oregon grape

    Mahonia repens

    Mahonia repens, commonly called creeping Oregon grape, is a small woody evergreen native ground- cover growing to about 2 feet tall and wide and hardy to Zone 4. It has dark green, holly-like leaves and produces clusters of yellow flowers followed by blue-purple berries in fall.

    Maonia repens bloom chart


    4. Brunnera macrophylla / Siberian bugloss

    BruneraBrunnera is a mounding perennial, 1 ½ feet tall by 1½- 2 ½ feet wide hardy to zone 3. Foliage is heart- shaped, dark green or with silver/white variegated leaves depending on the variety. It is also commonly called “false forget-me-not” after the small blue flowers produced in spring.

    Brunera bloom chart

    5. Convallaria majalis / Lily of the valley

    Lily of the valley

    Convallaria majalis, commonly called lily of the valley, is a low growing perennial  about ½ to 1 foot tall. It spreads by rhizomes and is hardy to zone 3. It has deep green, large, lily-like leaves and produces very small white and fragrant nodding flowers in early spring.

    Lily of the valley bloom chart

    6. Corydalis lutea / Yellow corydalis

    Yellow corydalis flowersPhoto credit: Missouri Botanical Garden Plant Finder

    Corydalis is a mounding, herbaceous perennial growing 1 to 1 ½ feet tall and wide and hardy to zone 4. It produces small nodding yellow flowers on top of medium green, fern-like foliage, and blooms sporadically spring through fall.

    Corydalis bloom chart

     

    7. Epimedium x rubrum / Red barrenwort

    red barrenroot flowers and foliate

    Red barrenwort is a perennial groundcover, 8-12 inches tall, and hardy to zone 4. Foliage is light green and heart shaped. It produces small nodding red blooms in May.

    Red barrenwort bloom chart

    8. Galium odoratum / Sweet woodruff

    Sweet woodruff

    Sweet woodruff is an herbaceous perennial groundcover that grows ½ to 1 foot tall and is hardy to zone 4. Foliage is light green and whorled. It produces small clusters of white fragrant flowers in April and May.

    Sweet woodruff bloom chart 

    9. Hedera helix / English ivy

    English ivy leavesHedera helix, commonly called English ivy, is a woody climbing and spreading perennial with dark green, lobed foliage. It is hardy to zone 4 and grown for its vine-like or groundcover foliage. It rarely produces inconspicuous green-white flowers.

    English ivy bloom chart

    10. Heuchera / Coral bells

    Coral bells

    Photo credit: Missouri Botanical Garden Plant Finder

    Heuchera, commonly called coral bells, is an herbaceous perennial with a mounding habit that grows 1 to 1 ½ feet tall and wide. They are hardy to zone 4 and produce small showy white, red, or pink flowers on stalks above the foliage. Coral bells brighten shade gardens with varieties of colored foliage: reds, oranges, and lime greens.

    Coral bells bloom chart

     

    11. Hosta / Hosta

    Hosta

    Hostas are herbaceous perennials that come in many varieties, ranging from 6 inches to 3 feet tall and wide and they are hardy to zone 4. Hostas are primarily grown for foliage which range in size, shape, and variegated colors of green, white, and lime. They also produce fragrant flowers on tall stalks in late summer.

    Hosta bloom chart

    12. Hypericum calycinum / St. John’s wort

     St. John's wort

    Hypericum calycinum, commonly called St. John’s wort, is a small spreading groundcover that grows to about 1 foot tall and is hardy to zone 4. St. John’s wort has medium green oval foliage and produces 5-petaled, rose-like bright yellow flowers in summer.

    St. John's wort blooom chart

     

    13. Lamiastrum galeobdolon / Yellow archangel

    variegated leaves and yellow flowers of yellow archangel
    Photo credit: Missouri Botanical Garden Plant Finder

    Lamiastrum galeobdolon, commonly called yellow archangel, is a mounding herbaceous perennial that grows to 1 to 1 ½ feet tall and wide and is hardy to zone 4. Yellow archangel has green and silver variegated foliage and produces small yellow flowers on stalks in June, with secondary blooms in fall if dead-headed.

    Yellow archangel bloom chart

    14. Rhus aromatica / ‘Gro-Low’ fragrant sumac

    'Gro-low' sumac

    Rhus aromatica ‘Gro-Low’, commonly called Gro- Low fragrant sumac, is a low-growing shrub reaching 2 to 3 feet tall and 3 to 6 feet wide and is hardy to zone 3. Fragrant sumac has medium green leaves that turn vibrant red in fall and produces insignificant white-yellow flowers in spring.

    'Gro-low' sumac bloom chart


     

    15. Tiarella cordifolia / Foamflower

    Foam flower

    Tiarella cordifolia, commonly called foamflower, is a clumping herbaceous perennial that grows to 1 foot tall by 1 to 2 feet wide and is hardy to zone 4. Foamflower has sharply lobed foliage available in several variegated colors such as greens and reds. Foamflower produces showy, airy white or pink flower stalks.

    Foam flower bloom chart


      References

    eXtension.org. (2015, January 26). Plants for Water Wise Pollinator Gardens: Creeping mahonia (Mahonia repens, Berberis repens, Berberis aquifolium var. repens).
    Retrieved from https://landscape-water-conservation.extension.org/ s=Plants+for+Water+Wise+Pollinator+Gardens%3A+Creeping+mahonia+

    Lin, B.-S., & Lin, Y.-J. (2010). Cooling Effect of Shade Trees with Different Characteristics in a Subtropical Urban Park. HortScience, 45:1, 83-86.
    Retrieved from https://journals.ashs.org/hortsci/view/journals/hortsci/45/1/article-p83.xml?rskey=hgGuQy

    Mee, W., Barnes, J., Kjelgren, R., Sutton, R., Cerny, T., & Johnson, C. (2003). Water Wise: native plants for intermountain landscapes.Logan, Utah: Utah State University Press.

    Missouri Botanical Garden: Plant Finder. (n.d.). St. Louis, Missouri.
    Retrieved from http://www.missouribotanicalgarden.org/plantfinder/plantfindersearch.aspx

    Papas, C. (2017, August 31). A Host of Hostas. Pennsylvania.
    Retrieved from https://extension.psu.edu/a-host-of-hostas

    Sellmer, J. (2017, August 4). Shade Tolerant Trees, Shrubs, and Groundcovers. Pennsylvania. 
    Retrieved from https://extension.psu.edu/shade-tolerant-trees-shrubs-and-groundcovers


     

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