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Top 10 Shade Garden Plants for the Pacific Northwest

Top 10 Shade Garden Plants for the Pacific Northwest Featured Image

It’s hard for me to list a top 10 list for any category of plants, but here I try. It is a stretch to come up with a definitive list because my favorites vary from season to season and sometimes from day to day.  When people ask me what my favorite plant is, my response is likely to begin with the comment “at this moment”, and then continue on with a name.  My garden palette of favorite plants has changed greatly over the years and I would expect it to continue to change.  If I was asked to do this list in mid-summer, it would probably be different than what it is now.

Either way, this list includes some plants that I believe do especially well in shady summer containers. Others are purely early-season ephemerals that disappear after making a grand show in spring. Some are wonderful shrubs and summer perennials that will make any shade garden shine.

With all the plants mentioned, I have learned that they grow best in conditioned soil that is rich in organic matter.  The Sunshine® Canadian Sphagnum Peat Moss helps provide natural organic matter that lasts.  For containers, Sunshine® Container Potting Mix is ideal as it too has earthworm castings as well as coir for increased water-holding capacity, which can be very important in the summer.

Also, be aware of different types of shade conditions in your yard before planting a new plant. Perhaps there are tree roots that might rob the soil of precious moisture in the summer, in which case adding a layer of water-holding soil amendment might help.

#1 Hellebores

Double Painted Hellebore

Double Painted Hellebore

These effortless perennials would have to be number one on my list, not only because they tolerate shade, but because they are among the first plants to bloom in late winter/early spring. They are also very easy to care for, their flowers come in a variety of colors, and their evergreen leaves look great all season long. There are many different named cultivars on the market. For me, the variety ‘Jacob’ is a very reliable early bloomer, and ‘Double Painted’ has extraordinary dark red and white color. They are true summer perennials that send up stems of lily-like lavender or white flowers are varying times in the season.

 

#2 Bleeding Heart

Gold Heart Bleeding Heart

Gold Heart Bleeding Heart

Bleeding heart (Dicentra spectabilis) are elegant spring bloomers in their own right, but the golden-leaved ‘Gold Heart’ is my very favorite.  The stunning yellow foliage is outstanding and glows above the sweet, rose-pink, heart-shaped flowers that appear in mid-spring. This herbaceous perennial dies to the ground in the fall and then returns again in spring.

#3 Pacific Trillium

Pacific trillium

Pacific trillium (image by Wsiegmund)

The white-flowered Pacific trillium (Trillium ovatum) is a western native and a superb woodland plant.  The plant appears in early spring and flowers in late March.  The stem is topped with a whorl of three leaves and in the center is a stalk of usually white flowers.  By summer, the foliage will disappear until the next spring season. Trillium plants do not like to be disturbed so plant them an area where they can be left alone

#4 May Apple

Spotty Dotty May Apple

Spotty Dotty May Apple

Another great spring ephemeral that makes a big statement in the early shade garden, the May apple (Podophyllum peltatum) is grown for its unusual parasol-like leaves.  The foliage color varies depending on the cultivar, as leaves can be solid green or patterned with shades of brown.  The flowers are not readily visible as they appear under the large leaves.  The elegant hybrid Podophyllum ‘Spotty Dotty’ has particularly striking foliage of palest greenish yellow spotted with reddish brown.

 

#5 Elephant Ear

Elephant EarA tender shade plant for summer, elephant ear (Colocasia esculenta) grows well in summer warmth and likes some filtered sunlight.  It’s bold leaves look spectacular in large summer container.  The plants like a lot of moisture so water regularly for best looks and performance. There are many varieties with large leaves in bright green, yellowish, and dark purple shades. Try the cultivar ‘Black Magic’, which has deepest purple leaves that almost look black. In fall, harvest the bulbs and store them in a cool dry place over winter. Then plant them again the following spring.

#6 Caladium

Caladium candidum

Caladium candidum (Image by Jessie Keith)

Another beautiful shade plant with amazingly colorful foliage is Caladium. This tender summer plant is grown from tubers that are sold at garden centers in the spring.  Caladium are grown for their large arrow-shaped leaves which have patterns of green, white, pink and silver.  They are excellent plants for a shady location. If given regular moisture in summer, they will provide foliage color where many plants might struggle.

# 7 Hosta

Hosta ‘Paul’s Glory’

Hosta ‘Paul’s Glory’ (Image by Jessie Keith)

No top 10 shade plant list would be complete without the ever-useful hosta. Hosta is a traditional shade-loving foliage plant that comes in a wide range of sizes and colors.  Ideal for creating patterns that weave throughout a flower bed, hostas are lush, diverse, and beautiful.  Standard hostas are green but cultivars are hugely diverse with foliage of grayish blue to yellow and variegated bicolors in every shade in between. Some are several feet in height and others may only reach a few inches. All grow best in rich, well-drained soil that offers some moisture on hot summer days.

# 8 Siberian Bugloss

Jack Frost Siberian Bugloss

Jack Frost Siberian Bugloss

Another great summer foliage plant for shade is Siberian bugloss (Brunnera macrophylla). Its pretty, heart-shaped leaves add texture to shaded spots and variegated varieties, such as the  ‘Jack Frost’, brighten shaded gardens.  The leaves of ‘Jack Frost’ are silver, with green veins and a green border. In spring it produces small, delicate stems of violet-blue flowers. Siberian bugloss likes the same growing conditions as hostas.

#9 Oakleaf Hydrangeas

Alice Oakleaf Hydrangea

Alice Oakleaf Hydrangea (Image by Jessie Keith)

Few shade-loving shrubs offer the bold good looks of hydrangeas and oakleaf hydrangeas (Hydrangea quercifolia) are offered in a wide variety of pleasing cultivars.  All are shade-loving plants even though many will tolerate a fair amount of sun with adequate moisture, a good reason to amend their soil with Black Gold Garden Compost Blend.  Check with your local garden center to discover on best varieties for your garden situation.

#10 Primroses

Primrose

Primrose (Image by Jessie Keith)

For early season color, few flowers are as delightful and diverse as primroses (Primula spp.).  Primroses are often one of the first flowers that garden centers will sell in the spring.  All tend to flourish in shady gardens in our area,  and the low-growing perennials come in many different flower colors.

So there are ten current shade plants on my list, but that list is ever-evolving and will probably change tomorrow.  Let is serve as a guide to gardeners wishing to plant reliable shade plants in their gardens. Another tip is to visiting your local garden center to get specific planting advice for your tastes and garden situation.

My Favorite Summer-Flowering Trees

 

My Favorite Summer-Flowering Trees Featured Image
The midsummer-flowering golden rain tree (Koelreuteria paniculata) is a great choice.

With the proliferation of spring-flowering shrubs and trees, sometimes the trees that flower in the summer can be overlooked. This is too bad because there is quite a selection of summer flowering trees from which to choose. Many people visiting our garden are often surprised to see the trees that are in bloom in July and August. So, as people visit our summer gardens, we make sure to educate them about our favorite summer-blooming trees.

Crepe Myrtle

Crepe myrtle trees
Standard-sized crepe myrtles develop fine, vase-shaped habits.

One of my favorite summer blooming trees is crepe myrtle (Lagerstroemia indica). Perhaps thirty years ago I planted one of these small, multi-stemmed trees in my garden and at that time it was not a well-known tree in the area. It has since thrived and is now about 20 feet tall. It blooms in August and continues flowering into September with flowers that are pale lavender.

Sunshine Sphagnum Peat Moss packTruly, it is the terminal clusters of small, curly edged, brightly colored flowers of white, pink, red, or lavender that really make these trees shine. But, crepe myrtles have many other desirable attributes. The leaves are often tinged with red when they open in the spring and then turn dark green as they mature. The bark is another outstanding feature. As the trees mature, the smooth grey or tawny bark begins to exfoliate, revealing a lower layer of copper-colored bark. The bicolored effect is especially attractive in winter. Plus, many crepe myrtle trees have beautiful fall leaf color of red, orange, and/or yellow.

There is one common problem that these trees may have. That is powdery mildew. While the tree in my garden sometimes gets powdery mildew, many of the new hybrids are powdery mildew resistant. Trees planted in open areas with a lot of airflow and sunlight are also let apt to get the disease. Trees also perform best in very well-drained soil. The addition of Sunshine® Canadian Sphagnum Peat Moss will increase fertility and drainage.

Natchez crepe myrtle bark
The bark of ‘Natchez’ crepe myrtle looks beautiful any time of year.

For many years, the U.S. National Arboretum has conducted a breeding program and introduced many crepe myrtle trees and dwarf shrubs that have been selected for winter hardiness and mildew resistance. Many of the mildew-resistant introductions have Native American names, such as ‘Zuni’ (bright purple flowers and orange-red to maroon fall leaves), ‘Tonto’ (semi-dwarf, fuchsia-red flowers, and orange-red fall leaves), ‘Hopi’ (semi-dwarf, pink flowers, extra attractive bark, and brilliant fall leaves in fiery shades), and ‘Natchez’ (white flowers, extra attractive bark, and orange-red fall leaves), and are exceptional performers in the garden. These new cultivars come in many sizes and have a wide selection of flower colors to choose from including white, red, pink, and various shades of lavender.

More recently some crepe myrtle plants have been developed for their intense black-purple foliage. Examples are Black Diamond® and Sunset Magic. Check with your local garden center to see if any of these beautiful selections are available.

Seven Son Flower

Seven son tree white flowers
Seven son tree has fragrant, white flower clusters in summer.

The Chinese seven son flower (Heptacodium miconioides), is an easy-to-grow, summer-flowering tree that we do not often see, probably because it is not well known. The common name, seven son flower, is named for how the flower clusters are arranged. Smaller whorls of seven small flowers comprise the larger flower clusters. The flowers appear over a long period in the summer, from July to August, and are ivory and fragrant. They are followed by masses of attractive small fruits that appear inside rose-purple calyxes. From a distance, these calyxes look as though the tree is flowering.

There is one seven son flower in my garden that receives minimal care and still performs well. This tree can reach 15 to 20 feet tall and 10 feet wide and be trained as a single or multi-trunked specimen. The leaves are glossy green and the bark exfoliates, which is an added feature.

Harlequin Glorybower

Harlequin glory bower fruit
The colorful fruits of harlequin glory bower are almost as pretty as its flowers.

When the harlequin glorybower (Clerodendrum trichotomum) blooms in my garden the fragrance of the flowers is almost intoxicating. Flowers appear in late July and August in white clusters. This tree also has the common name of peanut butter tree because when the leaves are crushed they have a peanut butter scent. This tree has fruits with scarlet edges that develop metallic-looking turquoise centers that will often last until after the leaves fall in autumn. It is quite a sight to see these colorful fruits on bare branches. This tree does sucker, so beware and remove suckers as soon as they appear.

Golden Rain Tree

Golden rain tree pods
The papery pods of golden rain tree are unusual and attractive in their own right.

If you have more space in your landscape, the midsummer-flowering golden rain tree (Koelreuteria paniculata) is a great choice. When mature, the trees reach a stately 30 to 40 feet–not too big and not too small. Airy clusters of golden flowers cover the tree when in bloom and are followed by interesting, drooping papery pods that are attractive in their own right. The tree’s compound leaves add textural interest and turn shades of gold, orange, and red in fall. Look for the variety ‘September’, which flowers later, from August to September.

This list offers just four examples of attractive summer-flowering trees. For more selections, visit a local arboretum. Many local garden centers will also have other suggestions for sale and are an excellent local source of information. Don’t think that flowering trees are only for spring. Extend your bloom season into summer and sometimes even into fall.

Harlequin glory bower flowers
The white summer flowers of harlequin glory bower are in attractive clusters.