Most home gardeners take a break during the winter. The gardens have been prepared for winter; no weeding or seeding is planned until spring. Winter is a time to dream about next year’s garden.
But late fall and winter are busy times for our Parks and Recreation stewardship crew. Many native seeds need cold winter temperatures in order to germinate. According to the useful website Ecolandscaping.org, thawing and freezing loosen the outer coating of some native seeds, signaling them to germinate as the soil warms. The Milkweeds (genus Asclepias) and Bee Balm (Monarda fistulosa) would be examples of native seeds that require the winter’s cold before germinating. [Use pause button to see captions below, if necessary.]
Other seeds may need multiple seasons in the soil before they germinate – like Round-lobed Hepatica (Hepatica americana) or Common Trillium (Trillium grandiflorum). [Click on photos to enlarge; hover cursor for captions.]
And of course, given the diversity of native plants, some seeds sprout and grow in one growing season like Black-Eyed Susans (Rudbeckia hirta) or New England Asters (Symphyotrichum novae-angliae).
Native Seeds Can Be Planted Almost Year ‘Round
Because native plants are adapted to our climate, very early spring, late fall and even snowy winter days can all be times for planting in our parks and natural areas. In November of 2015, the northern prairie at Draper Twin Lake Park was seeded. In this case, the planting area was huge and special equipment was required to get the native seed distributed evenly across the site. So Oakland Township Stewardship Manager, Dr. Ben VanderWeide, used a native plant contractor. By 2018, a lush prairie began to bloom at Draper Twin Lake Park.
In the winter of 2018, Ben and his stewardship specialist did a very orderly planting of moisture-loving seeds in the emerging wetlands at Charles Ilsley Park. Last winter when I reported on interesting tracks at Charles Ilsley Park, I mentioned a neat grid of “tracks” on the snowy surface of one of the wetlands.
Of course, they were the footprints left by Ben and Alyssa as they seeded the spring-fed pond with a native wetland mix. (The birders had trekked across the pond earlier in the morning.) Ben had planted Water Plantain (Alisma triviale), some sedges (grass-like plants), and bright purple Monkey-Flower (Mimulus ringens) along with other wetland species.
Many of the plants they seeded aren’t apparent yet. But nature took temporary advantage of the spot. Up out of the wetland sprouted a native annual Witchgrass (Panicum capillare). We’ll have to wait for Ben’s plants to grow larger – but meanwhile, the seed bank has produced a grass that feeds the caterpillars of several Skipper butterflies and produces late fall seeds for lots of birds, including cardinals, woodcocks, bobolinks, bobwhite quail and many others.
Sometimes, Ben hand sows the native seed that his crew and volunteers harvest each year from various parks. Here on a cool April morning of 2018, shortly after a prescribed burn, Ben is casting seed at Bear Creek Nature Park by hand in a tradition that dates back centuries. It’s a simple way to plant smaller amounts of gathered seed in certain areas that can benefit from more native plants.
A Kind of “Weeding” Happens Year ‘Round as Well
Just as in a garden, removing or thinning unwanted plants is an endless stewardship task in natural areas. Invasive shrubs that crowd or shade out our native species can literally take over fields. To give native plants a chance to establish themselves, the non-natives must be removed repeatedly for several years in a row. Vines like Oriental Bittersweet (Celastrus orbiculatus) must be cut and treated to keep them from strangling trees by spiraling around their trunks – or to prevent them from climbing across the crowns of trees, making them so top-heavy that they fall in wind storms. Non-native wildflowers and grasses can be invasive too, while providing little food and shelter for wildlife. Late autumn and winter can be ideal times to do those jobs, when plants are pulling down nutrients into their roots.
In the fall of 2018, Ben arranged for a forestry mower to remove a huge area of aggressively invasive shrubs that had blanketed the fields north of the pond for decades. Last year in early spring, with snow still on the ground, he and his stewardship assistant spent a few days carefully seeding this vast area with native seed since the area was too full of mowed shrub material to be planted by machine.
A month ago on a dry winter day, he went over the area again with a bushhog since many of the shrubs tried to make a comeback during the summer before they were spot treated in August. It was great to see these areas cleared again so that the architecture of Bear Creek’s natural rolling landscape could be fully appreciated once more!
In 2016, I wrote a history blog about how Bear Creek Nature Park looked when it was a farm during the Great Depression. In the library’s local history room is a book entitled Incredible Yesterdays (Ravenswood Press, 1977) by local author George Comps who lived on the property in the 1930’s. At one point, he described a moonlit night when he and his sister walked to the Center Pond. While George stood on the south side, his sister went around to her favorite “Big Rock” on the north side and they could see each other across the pond in the moonlight. When I wrote the 2016 blog, I bemoaned the fact that what I believe was that “Big Rock” was buried in invasive shrubs that also surrounded the pond, blocking the view to the other side. But with Ben’s last mowing of the land, the Comps’ favorite rock is once again visible and the view across the pond that they saw some 75 years ago is possible again. Now that’s both land and history preservation!
Last week, a different kind of “weeding” was happening at the Wet Prairie on the Paint Creek Trail. In last October’s blog, I described the very special conditions of this natural area that blooms with many unusual wildflowers throughout the growing season.
Though adapted to fire and both wet and dry conditions, these rare-but-sturdy flowers do need lots of sunshine. Over the years, trees have grown up around the edge of the Wet Prairie, shading out some of the sunlight these lovely plants require. So this January, Ben and his stewardship specialist Grant, have been felling some trees to bring more sunlight to this special spot on the Paint Creek Trail. They’re also working to eliminate a large, dense thicket of Glossy Buckthorn (Frangula alnus), like the ones they removed last year also at Bear Creek Nature Park’s marsh. An aggressively invasive bush, glossy buckthorn crowds out native plants and its admittedly attractive berries are also not as nutritious for wildlife as those of our native shrubs and plants.
Big Rewards for Year ‘Round Work
The eastern prairie at Charles Ilsley Park is one of my favorites – a huge rolling expanse embraced by forest. In February last year, its austere palette of browns and dark grays suited the inward quietness of a winter day. This park has required years of “weeding” – removal of non-native shrubs, elimination of stands of non-native plants and coming this spring, another prescribed burn, if the weather allows. Like many of you, I imagine, I don’t relish the sound of chain saws against wood, the stoop work of treating stumps to prevent the return of invasive shrubs, the roar of mowers as they chew through a thicket of invasive shrubs.
But all of that is just preparing the way for native plants and their seeds to flourish. And the reward is great – a richly diverse native habitat where bees and butterflies sip at blossoms, where birds build nests in the deep grass or along the tree line, where creatures and their young are fed by plants that they’ve thrived on for thousands of years. Jane Giblin, of the Michigan Wildflower Association, recently quoted someone who said we should “garden as if life depended on it,” because, of course it does! And that’s also the goal of our township’s stewardship program – to restore our parks and natural areas by “weeding out” plants that don’t provide rich, healthy habitat while protecting, nourishing and restoring the plants that feed and house the creatures that called this land home eons before we did.