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Climate-Smart Gardening Ideas

The Well-Dressed Garden by by Marty Ross
by Marty Ross
The Well-Dressed Garden | December 1st, 2019

Take care of your plants, and you're taking care of the planet: There are lots ways to make a difference for the environment and keep a beautiful garden, too.

Landscape architect Pamela Conrad grew up on a farm in Missouri and took her love of nature and the outdoors out west, to a professional practice in San Francisco, where she puts environmentally smart landscaping ideas to work. Her climate-positive design initiative, launched for landscape architects and garden designers, was founded to help these professionals manage the carbon footprint of their projects. But the concepts she advocates apply just as well to our own backyards. Even a tiny garden can conserve precious resources.

Right off the bat, it's important to put certain assumptions aside. "People associate green with good, and that's not always the case when it comes to high-maintenance, high-resource landscapes," Conrad says. Typical lawns, pampered with frequent watering, pumped up with chemical fertilizers and maintained with gas-powered equipment, are actually carbon emitters, she says. In projects large and small, reducing the size of a lawn saves resources in many ways -- including reducing the amount of time and energy spent on its maintenance.

Homeowners "have lots of opportunities to make a difference in the way they design or maintain their landscapes," Conrad says. One easy way to support a healthier environment is to plant more trees, she suggests. Trees, especially deciduous trees, are environmental heroes that remove carbon dioxide from the atmosphere and store it, which helps slow the warming of the earth's atmosphere. Conrad also recommends reducing the use of hard, impermeable paving, substituting with gravel or permeable paving, so rainwater can seep into the ground instead of running off into storm drainage systems. She suggests using compost or organic fertilizers instead of chemical fertilizers, and, in her projects, she specifies native plants wherever possible. Although her projects tend to be large in scale, these practices are all perfectly appropriate for home gardens, she says.

Conrad's toolkit for designers (on the Climate Positive Design website) lists dozens of tips and ideas for environmentally friendly landscape practices. If you're redesigning an existing landscape, you may be able to reuse existing pavers or bricks in a new design instead of sending old materials to a landfill, she says. She also advocates planting in layers -- with a canopy of trees, an understory of shrubs and groundcover perennials -- to give a garden dimension and character, to reduce runoff and to create habitats for birds, butterflies and other pollinators.

The positive results of these efforts are not just a matter of speculation. In case studies of design projects, Conrad discovered that making a few changes -- such as planting more trees and shrubs, reducing lawn area and using permeable paving instead of concrete -- made a significant difference in the projects' carbon footprints. The changes reduced the carbon footprint by 80 percent or more in some cases, and often shaved 20 years or more off the time required for a project to achieve the final goal of becoming carbon neutral.

By encouraging designers to make a few environmentally friendly design changes, "within the next 10 years, we could take more carbon dioxide out of the air than we are emitting," Conrad says. It's a lofty environmental goal for garden professionals, but it also pays off economically because environmentally sound landscapes cost less to maintain than designs with extensive lawns and plants that are not adapted to the site.

Regulations of emissions are already moving to the forefront of environmental policy in every region, but there's no reason to wait for regulations, Conrad says. "We have ways to take carbon dioxide out of the atmosphere every day." Her pathfinder tool, and the projects she and colleagues are already working on, are designed to set an example right now, to help inspire change. Ecologically smart landscaping is "a type of activism that does not require policies," Conrad says. You can be an environmental champion in your own backyard.

SOURCES

Landscape architect Pamela Conrad is a principal in CMG Landscape Architecture (cmgsite.com) in San Francisco, California, and the founder of Climate Positive Design, climatepositivedesign.com. Anyone can access the resources and information on the website.

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Ideas From the High Line

The Well-Dressed Garden by by Marty Ross
by Marty Ross
The Well-Dressed Garden | November 1st, 2019

The High Line is a gritty, glorious garden in the pulsing heart of New York City, full of ideas for gardens and gardeners everywhere. It is a landmark, an ever-changing horticultural and social scene -- and an inspiration.

This garden doesn't attempt to hide its industrial roots. The abandoned train tracks running through the elevated park near the Hudson River are as much a part of the garden as the flowering shrubs, perennials and grasses that flourish there. The High Line celebrated its 10th anniversary this year and opened an extension, known as the Spur, the last section of the former freight line 30 feet above the hurly-burly of the city streets. With the addition of the Spur, the thriving greenway of the High Line is now nearly 1.5 miles long. Millions of visitors explore the space every year while taking in sensational views of the bustling city and the river.

Eric Rodriguez, the High Line's director of horticulture, is the steward of hundreds of thousands of plants, many of them North American native perennials and grasses, woven into a design by the renowned Dutch plantsman Piet Oudolf. The High Line doesn't represent an unobtainable model of perfection, Rodriguez says: It is a garden full of possibilities for anyone. "We are actively trying to encourage people to take ideas home," he says.

The park's design took its cues from the wild, weedy nature that had established itself on the tracks in the 25 years after the line was abandoned. It is a lively, exciting, densely packed garden -- of surpassing beauty at all seasons -- filled with hard-working perennials, shrubs and small trees. It's also an environmentally friendly place, designed to invite pollinators and conserve resources, and maintained without the use of herbicides or pesticides.

Rodriguez thinks of the High Line's planting scheme as "a vertical sandwich." In each area, he says, "we have a grass matrix, and on top of that is an herbaceous perennial matrix." In areas with woody plants, the design expands to include a layer of shrubs and a canopy of trees -- but since the soil is only about 8 inches deep all along the High Line, only relatively small trees and shrubs can be planted. Species with multiple stems, including buckeyes, fringe trees and serviceberries, thrive in the harsh conditions, exposed on all sides to wind and weather and to the reflected light and deep shadows cast by tall buildings.

Although most High Line trees will never be giants, leafy trees embrace the beds in summer; in winter, their trunks, branches and bark impart a rare beauty. Multistemmed trees and shrubs are easier to manage in the garden than single-trunk plants, Rodriguez says. When stems get too tall or too lanky, or start to grow out of bounds, they can be cut back (sometimes to the ground), and new stems emerge. It's a great strategy for home gardeners, too.

Oudolf's planting design calls for extremely tight spacing: six to eight plants per square foot. To make it work, "we put plants in very small," Rodriguez says. "In some ways, we push back on the instant gratification" by using smaller plants, he says, but the planting style allows the garden to conserve resources. Tight spacing reduces watering needs because the plants shade the soil, limiting moisture loss to evaporation. Close spacing also helps control weeds. Gardeners everywhere, including on the High Line, Rodriguez says, "are always trying to think about how to work less without compromising their aesthetics."

Spring and summer on the High Line are beautiful, of course, but fall and winter are also spectacular seasons in which to experience the garden. Drying perennial foliage and grasses rustle in the wind, and their seed heads throw elegant shadows and attract birds to the park through the winter. The winter light shining through the twiggy tracery of trees creates a dramatic contrast to the built environment all around. The dormant plants under gray skies or in the snow let visitors appreciate the season more fully. "It's important for us to have the full life cycle of the plants," Rodriguez says. High Line gardeners don't cut the herbaceous perennials and grasses back until spring.

Over the winter, the gardeners nurture new ideas for the seasons to come, Rodriguez says. They consider new species to add to the garden, looking for plants that will perform well in the changing urban environment. Buildings with reflective glass have increased the heat and light in some areas along the High Line, and wind speeds and patterns have also changed as new buildings have been put up nearby. Among other things, the gardeners are interested in introducing more plants that attract beneficial insects, Rodriguez says, "and we're adding things that we want just because they would be fun and pretty."

The High Line is not, strictly speaking, a garden but a park, and the gardeners look to nature for their inspiration. They study plant communities in native plant reserves in the region, including in coastal areas, where the vegetation has to be tough. The ideas they bring back to the city make the High Line more beautiful and sustainable, Rodriguez says, and the result may make you forget, just for a minute, that you're in New York City. But look again: This garden could be nowhere else.

SOURCES

-- The High Line is a public park on Manhattan's West Side. There is no admission charge. The park begins at the intersection of Washington and Gansevoort Streets, near the Whitney Museum, and continues up to 34th Street, just past Hudson Yards. The High Line is a former elevated train line, so you're above the traffic.

-- No matter where you live, the High Line is as close as your computer. The park's website, thehighline.org, is full of information about the history of the park, its development, pictures of plants and art you'll see in the park. There is a comprehensive plant list and a list of "plants of the moment." The website also has a calendar of events, information about tours, and information for anyone interested in becoming a Friend of the High Line or a volunteer. You can download a pocket guide to the park.

The High Line also has an app for your phone: a digital guide with an interactive map and information about food, events, vendors and restroom locations.

SIDEBAR

More Ideas From the High Line

Here are some tips and ideas from Eric Rodriguez, horticulture director of the High Line:

-- A strong design is the foundation of every good garden. An aesthetically pleasing design and well-chosen plants let you spend your time and resources on becoming a good steward of your local environment.

-- Plants that are native to your region will thrive in the climate and conditions in your garden.

-- Choose plants that attract pollinators and beneficial insects.

-- Conserving resources sometimes involves letting things go. Remember that death is part of gardening. "Gardening becomes less stressful when you have a comfortable acceptance of some plant deaths," Rodriguez says. Even experienced gardeners sometimes kill plants.

-- Learn to appreciate the full life cycle of plants. Perennials that have worked hard in the garden all summer and fall should not be disturbed through the winter. They shelter birds and insects, help prevent erosion, and create a natural mulch for themselves and surrounding plants. Cut perennials back in early spring, not in the fall.

-- High Line gardeners compost all the clippings and trimmings from plants. The resulting compost is used as a mulch in the gardens, and in places to build up the soil.

-- One of the best resources for gardeners is a good field guide to plants in your region, Rodriguez says. There is much to learn from what is already there.

-- When you're in native-plant or natural areas, look for plants you might like to include in your garden. Notice where and how they are growing, and when you buy plants for your garden, try to provide similar conditions.

-- Remember that change is constant in a garden, and that trial and error are among the most important ways to learn what works best for you.

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Hip, Happy Tulips: Plant Them Now

The Well-Dressed Garden by by Marty Ross
by Marty Ross
The Well-Dressed Garden | October 1st, 2019

Spring is not just a promise when you're holding a handful of tulip bulbs: it's a bright and colorful guarantee. Each tulip bulb contains the germ of at least one cheerful flower. Planting them now, in the fall, sets your garden up for a lovely springtime display of flowers.

Big public displays of tulips often involve sweeping mass plantings of a single tulip variety. Such a bold splash of color will certainly stop traffic, but tulips are versatile flowers and there are many ways to use them in gardens of any size or style. They're graceful, stately performers within the clipped hedges of a formal garden, they add style to cottage gardens, and they bring a winter-weary perennial garden to life. They're handsome companions for evergreen and spring-blooming shrubs. In pots, they put spring color at your fingertips.

"They're amongst my favorite spring-flowering bulbs," says Jacqueline van der Kloet, a Dutch garden designer whose expert eye for tulips in combination with other plants can be enjoyed in the planting designs at the Lurie Garden in Chicago's Millennium Park, in the Battery Gardens in Manhattan, and at New York Botanical Garden. She is inspired by the colors, shapes, heights, and flowering times of tulips, she says, and "it has become a game for me to keep coming up with new combinations." Her book, "A Year in My Garden," explores many of her favorites.

It can indeed be hard to choose. Officially, there are more than 3,000 tulip varieties (classified into 15 different types), from tiny, wispy species flowers to big doubles that look almost like peonies. Bulb specialists narrow down the selection for their customers, but they still list dozens of tulips in their catalogs every fall, alongside daffodils, hyacinths, crocus, and other bulbs. It's a dizzying selection, but choosing will be easier if you give some thought in advance to what colors you like, when in the course of the spring you want your tulips to bloom, and how tall they should be. If you choose a range of tulips with early, mid-, and late-season bloom times, you can expect tulips to be in bloom in your garden for a month or more. If you're going for a really bold show of color, you might stick to mid-season Darwin and Triumph tulips: you're still likely to have blooms for up to two weeks.

Catalogs such as Colorblends make it easy to be an expert tulip gardener. Tim Schipper, the owner, and his team experiment with combinations of different tulip varieties and offer tried-and-true blends so gardeners -- and landscape designers -- get it right the first time. They have worked with Jacqueline van der Kloet on designs for the bulb display in the Colorblends spring garden in Connecticut. A blend called Pillowtalk, made for romance, combines pink and creamy yellow tulips. If you prefer your colors on the brighter side, go for fearless combinations such as Critical Mass, which the Colorblends team describes as a "chain reaction of yellow, purplish pink, and maroon."

Coming up with tulip blends "is a little like mixing chemicals," the Colorblends experts say. "Get it wrong and nothing happens, or maybe too much. Get it right and the colors seem to feed off each other."

No matter which tulips you choose, they all need the same conditions and care. Fall is the time to plant them, when daytime temperatures are reliably cool and the soil is cool, too. Plant tulip bulbs in a spot where their foliage will receive lots of sun in the springtime, and also where the soil drains well. They need water to grow and flourish, but not too much: tulip bulbs are dormant during the summer, and automatic irrigation systems can cause them to rot.

Van der Kloet recommends planting tulip bulbs at least six inches deep; a good rule of thumb for tulips and other bulbs is to plant the bulb at least three times as deep as the bulb is tall. Firm the soil over the planting area and water well. A mulch of crushed autumn leaves looks tidy and insulates the soil.

After you have planted and watered your tulip bulbs, you've done your bit. The bulbs begin to put down roots right away, but you won't see a thing in the garden until early spring, when shoots begin to poke up through the soil. The handsome foliage is itself wonderfully encouraging after a long winter, and within weeks, you'll notice flower buds, which will soon show a hint of color. Sunshine encourages them to open, slowly at first and then with a flourish. Cool temperatures and spring rains refresh the tulip flowers and prolong their bloom. It is a pleasant time to be out in the garden, and you will find yourself admiring each and every glorious bloom.

SIDEBAR

Tulip Time

-- You can't plant too many tulips. Classic, dependable tulip bulbs cost less than 50 cents each (you can buy 100 for about $35 or $40), and with 100 bulbs, you can make a big impact.

-- In perennial gardens, tuck tulip bulbs into spaces between plants, making room for three, five, or even just one tulip bulb in each space. The effect, with flowers blooming through the length of the flower bed, is something like a wildflower meadow. Planting bulbs close together looks great, too -- like a flying carpet of color.

-- Darwin hybrid tulips and lily-flowered tulips are known for their ability to come back and bloom for several years. Many other tulips will return to bloom for a few years, also, but the first year is always the best. Little species tulips, which look great along the edge of a flower bed, can be excellent perennializers.

-- Deer are particularly fond of tulip flower buds. If deer are a problem in your garden, you'll need to spray tulip buds in spring with a deer repellant. Don't wait until the deer discover them: spraying is a preventative measure. Planting tulip bulbs in pots on the porch may keep them out of reach of the deer.

-- Plant tulip bulbs where you'll be able to watch them come into bloom from the windows of your house. Plant some out front, too: the neighbors will notice.

SOURCES

-- Excellent sources for tulip bulbs include: Colorblends (colorblends.com), Brent and Becky's Bulbs (brentandbeckysbulbs.com), and John Scheepers (johnscheepers.com).

-- Jacqueline van der Kloet (theetuin.nl) is an internationally known garden designer and the author of "A Year in My Garden" and 10 other garden design and nature books. Her business, Thee Tuin (The Tea Garden), in Weesp, near Amsterdam, the Netherlands, is open year round.

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