
Boulevard infiltration garden, early summer...
Douglas's boulevard infiltration and tall grass prairie gardens, thrive in a suburban neighbourhood of mown lawns and tightly-controlled flower beds. The roadside ditch garden was planted with shorter species of native plants and sedges, including wetland species, to address potential sight-line issues for motorists and pedestrians. The ditch garden slows the flow of storm water runoff, allowing it to soak into the ground and be filtered of pollutants such as motor oil, pet waste, and chemical fertilizers, before it enters a local stream. In this early-summer view of his boulevard garden, native species such as eastern wild columbine (Aquilegia canadensis) and hairy beardtongue (Penstemon hirsutus) add colour to a carpet of common cinquefoil (Potentilla simplex), native grasses such as little bluestem (Schizachyrium scoparium) and side-oats gramma (Bouteloua curtipendula), and sedges such as foxtail (Carex vulpinoides), Pennsylvania (Carex pennsylvanica) and mace sedge (Carex grayi). In mid-summer, brown-eyed susan (Rudbeckia trilobum) and nodding wild onion (Allium cernuum) come into bloom, adding a different colour palette to the ditch garden.
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Prairie garden, mid-summer...
Douglas's tall grass prairie garden is at the height of colour in mid-summer (mid-July to early August). Taller species such as grey-headed coneflower (Ratibida pinnata), ironweed (Vernonia altissima), purple coneflower (Echinacea purpurea), bee balm (Monarda didyma), Culver's root (Veronicastrum virginicum), and blue vervain (Verbena hastata) add a slash of colour on the lawn portion of the garden, while shorter species such as butterfly milkweed (Asclepias tuberosa), brown-eyed susan (Rudbeckia trilobum), and nodding wild onion (Allium cernuum), punctuate the ditch garden. Douglas has had countless species of songbirds, butterflies, moths, insects -- and even hawks -- visit his city garden. One two occasions, he has spotted fireflies in his garden, something that even his elderly father had never seen before in Toronto in his entire life. The first insects to make Douglas's garden home were grasshoppers, and several species of butterflies have laid their eggs on host species specifically planted for that purpose: field pussytoes (Antennaria neglecta) are the larval host plant of the Painted Lady butterfly, and various milkweed species -- swamp milkweed (Asclepias incarnata), common milkweed (Asclepias syriaca) and butterfly milkweed (Asclepias tuberosa) -- are the host plant of the Monarch butterfly.
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Prairie garden, late summer...
Native plant gardens are low maintenance. Douglas waters his garden about once or twice a year, but only if it's an extremely dry summer. The most work he does each year is to cut the garden down to the ground in early April -- a process that takes about two days because he uses manually-operated hedge clippers to cut the dead plant material into 4-inch pieces (he doesn't use any electric or gas-powered equipment in his garden... there's no leaf blower in this garden!). The dead plant material from the previous growing season becomes mulch for the new growing season. Thus, all nutrients remain on site and the mulch retains moisture and virtually eliminates weeding. Interestingly, the only weeds he does see on occasion are dandelions in the narrow turf pathways which weave their way through the native plantings. Otherwise, the garden is too abundant to allow common weeds to germinate and grow. This late-summer view shows cup plants (Silphium perfoliatum) forming a tall privacy hedge along the edge of the lawn garden (gold finches love to eat cup plant seeds in late summer/early autumn), tall sunflower (Helianthus giganteus) to the right of the cup plants, and the intense red, moisture-loving cardinal flower (Lobelia cardinalis) in the ditch garden.
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Prairie garden, early autumn...
The colours in a native plant garden change throughout the year, lending variety and visual interest to the landscape. Autumn brings a palette of yellows, golds and bronzes to the garden. This image shows the low-growing grey goldenrod (Solidago nemoralis) and blue vervain (Verbena hastata) in the ditch garden. Native grasses add autumn interest as well: little bluestem (Schizachyrium scoparium) turns a lovely reddish-bronze. Douglas leaves the plants standing over the winter because over-wintering birds use the fluffy seed heads as nesting material and eat the abundance of seeds the plants produce. He especially likes how lovely the garden looks covered in a light dusting of snow. You can appreciate from these photos how a native plant garden changes throughout the growing season, providing visual interest year round.
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