Archive: September 2017

In Maine, the leaves have begun to turn and there is no mistaking the transition from summer to autumn in the garden. Although I love fall, I’m not quite ready to see summer go.

The daylilies that filled the garden with color in July are mostly gone, with just an occasional bloom on one of the late-blooming or re-blooming varieties like Lily Muster, Final Touch, Rosy Returns or Sandra Elizabeth.

Lavender also continues to bloom, but much more sparsely than it did in July. In most of the garden, Tradescantia virginiana has died back, but on the side slope it continues to put up new growth and make new flowers.

Other summer flowers are making a better show in September. The beautiful clear pink flowers of Geranium x oxonianum, which loves Maine’s cool climate, have been blooming continuously since June.

Spirea x bumalda ‘Neon Flash,’ added to the garden last year at the top of the side slope planting, has turned out to be a star, putting out a flush of new blooms just as most of the flowers growing around it are fading.

 

Most of the summer phlox varieties that graced the garden in August are still hanging on, but their flowers look faded and blowsy.

Over the years, I have added fall-blooming flowers to the garden. The latest addition is the Hydrangea paniculata ‘Pinky Winky’ planted in the new rain garden. Although it is still quite small, I am enjoying its elegant flowers (which deserve a more dignified name). September is the time when the sedums come into their own. The groundcover sedum ‘John Creech’ has been blooming for more than a month, but the taller sedums have just begun to flower. As their flowers mature they will first become more intense and then darker in hue. By October, most will be the color of wine.

The real stars of the fall garden, however, are all the varied members of the large Asteraceae (composite) family. Some of these have been planted in my garden; others are wildflower volunteers growing around the edges of the garden.

Echinacea purpurea ‘Magnus’ continues to bloom along the Lavender Walk, but the big show in September is provided by two varieties of Liatris blooming on the side slope. Liatris novae-angliae is on the left below and Liatris aspera is on the right, below. (A third species, L. spicata, bloomed in August  here and elsewhere in my garden.)

Outside the boundaries of the garden, this is the season for goldenrods and asters. I confess that I don’t always have the patience to key out and properly identify the many species of these plants growing on my property. I’m not sure which one this is, although I’m reasonably certain it is a Solidago. The more easily identified species below are Solidago bicolor (silverrod) on the left and Solidago squarrosa, with its characteristic narrow, upright inflorescence, on the right.

I find the myriad asters even more confusing than the goldenrods. The easiest to identify is the stiff, flax-leaved aster (Ionactis linarifolia) which grows enthusiastically and blooms profusely in my sandy soil. This has lovely lavender flowers, which the camera has had trouble capturing. I am hoping to establish some of this in unamended soil at the bottom of the front slope planting that is next year’s big garden project.

Several other aster species grow at the edge of the woods along the side of the driveway.

The wild New England asters (Symphyotrichum novae-angliae) in my neighborhood have not yet begun to bloom. But in the garden, the popular cultivar ‘Alma Potschke’ is just beginning to open her buds.

Garden Bloggers’ Bloom Day is hosted on the 15th of each month (although some of us are habitually late to the party!) by Carol at May Dreams Gardens. Visit her blog to see September blooms from far and near.

Filed under: GBBD, Photo essays, seasons, wildflowers Tagged: aster, daylilies, goldenrod, hardy geranium, Hemerocallis, hydrangea, lavender, Liatris, phlox, sedum, Solidago, Spirea 'Magic Carpet', tradescantia

The new addition built onto my house three years ago added a feature that my house had never had before – gutters and downspouts. At one corner of the house, near the entrance, I installed a 50-gallon rain barrel under the downspout and attached a small length  of hose which allows me to channel rain water into nearby plantings. By the other downspout, at the west corner of the house, I decided to create a small rain garden.

A rain garden is a strategically placed depression in the ground designed to collect and slowly drain rain water and planted with water-tolerant plants. I don’t actually need a rain garden; my excessively well drained sandy soil slopes away from the house in all directions. Even in the heaviest downpours, water never pools for more than a few minutes. But my hope was that, by creating a depression that can collect and concentrate rain water, I might be able to grow the kind of moisture-loving plant that I normally can’t provide the right conditions for. I had my heart set on a hydrangea.

Last year I did some research on rain gardens, reading both a book on the technical details and the University of Maine Cooperative Extension’s advice. The technical book helped me figure out the appropriate size for my rain garden, which turned out to be very small – a mini rain garden, big enough for one hydrangea.

This year, I set out to execute my rain garden plan. My first step was to install a 4’ long flexible extension on my downspout to channel water from the roof in the proper direction. Next, I created a shallow swale to carry the rain water to the lip of the rain garden. I planted some divisions of Geranium x cantabrigiense ‘Biokovo’ in the swale and also along both sides of the downspout extension. This is a groundcover that spreads quickly and grows about one foot high. It should provide an attractive lining for the swale, and my hope is that it will help to camouflage the ugly downspout extension.

With that done, it was time to actually dig out the depression for the rain garden. Because the bottom of the rain garden should be flat, the standard advice is not to build it on a slope, but I didn’t have a choice. This meant that, in order to have the downslope side be at least six inches deep, the upslope side needed to be about two feet deep.  I used some of the soil I was removing to create a six inch high berm around the downslope edges of the rain garden.

Once I amended the soil in the bottom of the rain garden with aged cow manure and compost, I was ready to plant. The hydrangea went in first, planted in the center of the rain garden. I had originally hoped to install Hydrangea paniculata ‘Quickfire,’ a plant that I fell in love with the first time I saw it growing in a garden-tour garden several years ago. Alas, when I studied the patterns of sun and shadow in my rain garden area, I realized that it only got five hours of sun in August, probably not enough for a plant that needs full sun. Instead, I opted to plant Hydrangea paniculata ‘Pinky Winky,’ which is similar in size to ‘Quickfire,’ has beautiful two-tone cream and mauve flowers, and can thrive in a part-sun location. (As the catalog from my local nursery says, “Once you get past the name, this is a very worthwhile addition to a crowded group of plants.”)

I dug the hole for the hydrangea, filled it with water, and let it drain before putting in the plant and backfilling. Then I watered it thoroughly again. The hydrangea will eventually grow to largely fill this rain garden space, but I don’t want weeds covering the ground around it. Once the hydrangea was in place, I planted more of my groundcover geranium ‘Biokovo’ (a plant of which I have an almost infinite supply), putting in divisions around the circumference of the rain garden floor, and adding a few more in the side near the top lip on the upslope edges. These plants will grow toward each other and toward the hydrangea, probably forming a solid ring around it within 2-3 years. I also hope it will grow upward along the sides of the rain garden, stabilizing the soil and maybe even spilling out a bit over the top. As an added bonus, this attractive groundcover sports lovely pink and white flowers in June that will anticipate the colors of the hydrangea blooms.

We have rain forecast for later today, which will provide a chance to see how well my mini rain garden does in collecting rain from the roof.

Filed under: front garden, garden design, garden projects, plants Tagged: garden design, hardy geranium, hydrangea, rain garden