Stalwarts of the Late Spring Garden

After the early bulbs and perennials of spring have bloomed and faded, many of us experience a garden pause before the June bloomers begin their show.

If you find that you need more color to bridge the gap from spring to summer in your garden, here are a few plants that will easily tie the seasons together!

Old-Fashioned Bleeding Heart (Photo by Nancy Marie Allen)

OLD-FASHIONED BLEEDING HEART

Dicentra Spectabilis, commonly known as Bleeding Heart, is easily the best perennial for blooms that go from early May into June and sometimes beyond. You most often see these plants in the classic pink or white but there are new varieties now available including some with red flowers and golden or fern-like foliage.

In my gardens, bleeding heart begins its show along with the daffodils and continues well into peony season without missing a beat! Bleeding Heart prefers some afternoon shade and is cold hardy to Zone 3.

Jack Frost Brunnera (Photo by Nancy Marie Allen)

BRUNNERA

Also known as Siberian Bugloss or False Forget-Me-Not, Brunnera is an early spring bloomer here in New England. Although the delicate blue flowers tend to fade as June rolls around, these plants easily carry on through summer with their stunning silvery foliage.

Brunnera positively shines in the shade garden, blending well with Hostas, Solomon’s Seal and Astilbes amongst others. Brunnera is cold hardy to Zone 3.

Geranium Macrorrhizum (Photo by Nancy Marie Allen)

HARDY GERANIUM

Bigroot Geranium or Geranium Macrorrhizum is the first of my hardy geraniums to bloom, typically in mid to late May. The bright magenta flowers rise above the foliage on delicate looking stems but there is nothing delicate about these plants. Tough, reliable and drought-tolerant, Geranium Macrorrhizum forms an attractive mound, slowly spreading by rhizomes which make it an invaluable groundcover for sun to part shade.

Trim back the flower stems after blooming and the attractive foliage will look fresh all summer, sometimes turning red in the fall. This very hardy geranium is cold tolerant to Zone 3.

Guernsey Cream Clematis (Photo by Nancy Marie Allen)

CLEMATIS

Clematis are often thought of as fussy plants but they’re actually very easy to grow in a sunny garden. They come in an amazing array of colors, flower forms, and heights from short to tall, and bloom times stagger throughout the growing season. Taller clematis will need some kind of support for their climbing vines while shorter ones can be allowed to ramble playfully around and through other plants.

If you love clematis, try an early blooming variety to get the show going. Guernsey Cream clematis is one that blooms for me in mid-May with creamy white blooms. Most clematis are hardy to Zone 4 but check to make sure the variety you choose is one that will grow in your area.

Yellow Bearded Iris with Bloomerang Purple Lilacs (Photo by Nancy Marie Allen)

IRIS

Many Iris are June bloomers but there are a few early varieties that will make your May garden pop with color. If you’re partial to these beautiful plants and have the space, you can easily stagger the flower show for several weeks.

Iris are sun lovers and hardy to Zone 3. In the photo above, an unknown yellow bearded variety gifted by a neighbor blooms along with the lilacs!

Solomon’s Seal (Photo by Nancy Marie Allen)

VARIEGATED SOLOMON’S SEAL

Variegated Solomon’s Seal brings fragrant blooms and a touch of sparkling white to the late spring garden. The wild form naturally grows here at the edges of the forest, but the variegated fragrant variety (Polygonatum Odoratum Variegatum) is one I have grown in my gardens for years.

The remarkable thing about Solomon’s Seal is that it’s a plant at home in full sun to full shade. Yes, that’s right, the plants shown above grow in full sun in one of the hottest areas of my yard which is a testament to its toughness and versatility. In my shaded gardens, this same Solomon’s Seal grows in great swaths, the white variegation lighting up the shadows.

The tiny white bell-shaped blooms which hang along the stems in spring become dark berries in summer and the foliage turns a soft gold in the fall. This is a perennial that truly spans the seasons!

Plant Variegated Solomon’s Seal where it will have plenty of room to grow for these plants love to spread themselves around. Winner of the 2013 Perennial Plant of the Year Award and hardy to Zone 3.

Alliums in late May (Photo by Nancy Marie Allen)

ALLIUMS

The impressive globes of Alliums add drama and texture to our late spring gardens like nothing else! Many grow from bulbs although a few grow from rhizomes such as our common chives. Again, there are early, mid and late varieties to choose from along with a huge size range from ground-hugging to towering. Alliums love a full sun location and are hardy to Zone 4.

All of the above plants are deer and rabbit resistant in my Zone 6 New England gardens.

Getting to Know Veronica

Veronica, also known as Speedwell, is a old-fashioned plant that deserves a place in everyone’s garden. Originating from Northern Europe, they tend to be vigorous, carefree and long-lived perennials that attract butterflies, bees and hummingbirds as well as admiring gazes from humans.

Veronica ‘Red Fox’ (Image courtesy of American Meadows)

Veronicas have an interesting history. According to the Missouri Botanical Garden website, “the genus name honors Saint Veronica who reportedly gave a handkerchief to Jesus so he could wipe the sweat from his face on the way to Calvary, with some genus plants having markings that resemble the markings on the sacred handkerchief.” In addition, parts of the plant were once commonly used in herbal medicine; hence, the common name of Speedwell may refer to its ability to speed healing and feeling well.

Veronica Longifolia (Image by Mabel Amber from Pixabay)

When I first started gardening, I came across a pot of Veronica longifolia at a local nursery. The long, soft blue flower spikes caught my eye and soon it was keeping company with my pink June roses. What surprised me was not only how tall this plant grew in one summer but also how willing it was to keep flowering when I deadheaded the spent blooms; and it’s this ability to repeat bloom over a long season that makes Veronicas with flower spikes such valuable garden plants!

Veronica ‘Icicle’ (Image by Kerstin Riemer from Pixabay)

Not all Veronicas are in the big and tall department, however. Some varieties can be grown as groundcovers or used to soften a garden’s edge while others remain a tame 12″ to 20″ in height. In fact, the array of Veronicas available to gardeners today is quite impressive and that makes them easy to fit into any garden space, design or patio planter.

Veronica ‘Sunshine’ (Photo courtesy of ToGoGarden)

Veronicas are extremely robust and grow best in USDA Hardiness Zones 4 to 8. They generally have a long bloom season from spring to fall, especially when you remove the spent flowers which will encourage repeat performances. Colors tend towards blues, purples, pinks and white but the foliage can sometimes be silvery or golden, especially in the ground-hugging varieties. Perfectly suited to cottage gardens, companions include Foxglove, Daylilies, Roses, Daisies, Yarrow and Lady’s Mantle as well as late blooming spring bulbs. Although they prefer full sun, Veronicas will tolerate afternoon shade in areas with hot summers. Best of all, Veronicas are deer and rabbit resistant!

Veronica ‘Waterperry Blue’ (Photo courtesy of StoneHouseNursery)

Some popular Veronica varieties:

SUNSHINE – Small yellow leaves cover a low 1 to 2″ tall ground-hugging plant. Blooming briefly with tiny white flowers in spring, this Veronica is grown primarily for its bright foliage. Great in rock gardens, combined with succulents or tucked between stepping stones.

WATERPERRY BLUE – A creeping groundcover growing 4 to 6″ tall and spreading about 12″ wide. This cottage garden classic blooms repeatedly in soft blue flushes from spring to fall when the foliage takes on an autumnal burgundy hue.

GOODNESS GROWS – Medium sized at 12 to 15″ tall with a slightly wider spread. Striking violet blue flower spikes are produced all season. The compact size makes it a perfect “thriller” for pots and planters.

RED FOX – Another medium sized Veronica but with dazzling rosy-pink flower spikes from mid-spring to late summer. Red Fox is salt resistant and grows well in seaside gardens.

ICICLE – Sparkling white 6″ flower spikes adorn this beauty which grows to about 30″ tall. Excellent for cut flowers and a perfect addition to white or moon gardens.

BLUE GIANTESS – A soft lavender blue, this robust Veronica longifolia grows to 48″ tall with a spread of 1 to 2 feet. Plant with tall roses for a sensational early summer display!