Provide Winter Meals for Wild Birds

An American robin feasts on native holly berries in the Blomquist Garden. 
Photo by Cathi Bodine

by Katherine Hale

Winter is the hardest time of year for wild birds. Just when they need to eat the most to keep themselves warm, the cold drives the insects they depend on into hibernation. Even fruit and seed eaters aren’t safe, with unpredictable bouts of ice, snow and inclement weather cutting off access to their food sources.

Like support stations at a marathon, backyard feeders bearing sunflower seeds and suet offer birds a lifeline in stressful times, with quick and easy boosts of the calories and fat they need to survive. Feeding birds is a safe, easy and fun way to help local wildlife, and it also allows adults and children alike an up-close-and-personal opportunity to connect with nature.

Feeders aren’t the only way to help birds, of course. Native trees like dogwoods, hollies and wax myrtles provide welcome bursts of seasonal color—along with food and shelter for hungry fall migrants and overwintering residents alike. Withered seed heads of ornamental grasses and sunflowers can be left up after the frost for foraging juncos and sparrows. (You can cut them down in the spring to make room for new foliage or plantings.) Native plants also serve as hosts to caterpillars and grasshoppers, allowing insectivores like bluebirds and warblers to thrive. And of course brightly colored flowers are the best way to draw in nectar-drinking hummingbirds.

But the wonderful thing about bird feeders is that they are open to everyone—no land or garden required. For those who don’t have access to much outdoor space, or who are waiting for their plants to mature, bird feeders offer an effective and immediate alternative. As long as you follow a few simple rules—making sure there are bushes or other cover nearby for birds to shelter in; cleaning the feeders regularly to prevent disease; and keeping cats and other pets indoors—the only limits are your budget, imagination and time.

What birds frequent your feeders depends on the kind of offerings you set out. Woodpeckers appreciate suet. Chickadees and cardinals love black oil sunflower seeds. That said, part of the fun of setting up a bird feeder is that you never know who might drop by. Visitors to the Blomquist Garden of Native Plants frequently spy a pair of mallard ducks hanging out under the feeders, commuting from the pond nearby. Online resources like eBird, iNaturalist and Feeder Watch provide space for the scientifically inclined to share and document their findings.

Bird feeders in the Blomquist. Photo by K. Julian.

The beauty of bird feeders is that they allow you the opportunity to watch wild birds up close, with a house or windowsill serving as a blind. Beginning and seasoned naturalists don’t even have to step outside to see the resulting antics, which speed up as weather conditions worsen. The result is live-action drama worthy of a reality show, as the dominant chickadee scolds its flockmates away from the choicest morsels, or a red-shouldered hawk shows up to try and snag a feathered meal of its own.

If you’d like to try making simple bird-feeders of your own out of pine cones, lard and other natural materials (no nuts or nut products involved), join us for our annual Winter Wonderland Festival, on Sunday, December 8, from 2-4 p.m. at the Doris Duke Center. The family-friendly festival is free for Duke Gardens members, and $5 per child for non-members. (Please register in advance at http://duke.is/tZhVcV.) In addition to winter-themed crafts, there will also be storytelling, cookie decorating, festive music and our resident snowperson, Snowflake. Hope to see you there!

For more plant and nature stories about Duke Gardens, check out the Garden Talk column on our website. 

A Closer Look: Rhododendron Prunifolium

By Stefan Bloodworth
Photos by Sheon Wilson

It is somewhat fitting that Rhododendron prunifolium, the latest-blooming of our native azaleas, was the last of that group to be discovered and described by botanists. Native to the thickly vegetated, bottomland streams that crisscross the southern border counties of Georgia and Alabama, the plumleaf azalea proved to be a hard plant to find for centuries.

It was Roland Harper, one of the pioneering botanists of the Deep South, who first found the species in Randolph County, Georgia, in 1903. Working with one of Harper’s herbarium specimens from that trip, botanist John Kunkel Small decided upon the name Azalea prunifolia in 1913. In years to come, the species was reclassified as a member of the genus Rhododendron.

First displayed publicly at the Arnold Arboretum in 1918, Rhododendron prunifolium has garnered much horticultural praise for its large stature, its long, elegantly protruding stamens, and its vibrant reddish-pink blooms, which come forth in mid-summer—appreciably later than its 27 native Rhododendron cousins, most of whom are early to mid-spring bloomers.

Rhododendron prunifolium is endemic to a very small portion of the deep South, and it has been noted in recent years that this limited range has made the species quite vulnerable to habitat disturbance. As a result, it is listed as a threatened species by both national and global plant conservation organizations. In the Blomquist Garden, a sizable stand of this showy native can be found adjacent to the Edwin F. Steffek Jr. Bridge and Fern Grotto.

This plant highlight first appeared in "A Closer Look" in Duke Gardens' 2015 Flora Magazine. It is currently blooming in the Blomquist Garden of Native Plants.

Stefan Bloodworth is the curator of the Blomquist Garden of Native Plants. Sheon Wilson is the  publications coordinator at Duke Gardens.

Heat Wave! Stay Cool at Duke Gardens

The Blomquist Garden of Native Plants (gray area on the south side) and the Culberson Asiatic Arboretum (red area on the north side) are the shadiest areas of Duke Gardens.

By Sarah Leach Smith
Visitor Service Coordinator

It's that time again -- a sweltering mid-summer heat index is a daily occurrence and lower temperatures are nowhere in sight. It also happens to be an excellent time to visit Duke Gardens -- hibiscus, crape myrtle, black-eyed Susan and cardinal flower are all in full bloom.

Strawflowers in the Discovery Garden. Photo by Sue Lannon.

You can have a pleasant and comfortable experience at Duke Gardens this summer with a little bit of planning ahead. Below are some things to keep in mind before you arrive:

• Wear light-colored and loose-fitting clothing made with a natural fiber such as cotton to help you stay cool.
• Wear a hat at all times to shade your face and protect your skin from the sun. A parasol is also a good idea if you don't like wearing hats.
• Drink plenty of water -- 4 ounces for every 30 minutes outside is a good goal to aim for. Bring a water bottle with you to the Gardens and refill it at one of our water fountains outdoors or in the Doris Duke Center. See our heat advisory map for water fountain locations. 

Sun shining in the Discovery Garden. Photo by Lindsey Fleetwood.

Once you're here, it's important to orient yourself to shady spots so that you can take a break from the sun. The Blomquist Garden of Native Plants is a great choice, with thick native tree canopies that keep the temperatures lower than anywhere else in the Gardens. Another cool spot is the Culberson Asiatic Arboretum, which is also heavily covered with trees. There are benches throughout these two areas, so have a seat and enjoy the shade.

As you depart from the Gardens, we recommend that you have a "cool down plan" to help regulate your body temperature after being outside. 

When you are the Gardens or exploring other cool places this summer, keep the symptoms of heat exhaustion in your mind and be on the lookout for people who may be showing signs.

If you or another visitor are in distress, please seek assistance. If you don't have a cell phone to call 911, Duke Gardens has several emergency phones, which are marked with telephone icons on our heat advisory map. Stay safe and have a wonderful summer!

The Blomquist Garden of Native Plants: A Museum in the Woods

The Blomquist Pavilion. Photo by Sue Lannon.

By Sarah Leach Smith

Visitor Services Coordinator

This post marks the first in a series highlighting the curators and plant collections of Duke Gardens. It is thanks to them that we are a world class botanic garden!

Curator Stefan Bloodworth. Photo by Cecelia Xie.

When walking through the Blomquist Garden of Native Plants, many people find themselves thinking a common thought: "I feel like I’m in the middle of the woods!"

The Blomquist Garden is one of four unique gardens in Duke Gardens. Its curator, Stefan Bloodworth, is glad that people feel like they are in the middle of the woods rather than the middle of the city of Durham. As with each distinct area within Duke Gardens, this garden has a unique history and mission. 

The Blomquist Garden was dedicated in 1968 in memory of professor Hugo L. Blomquist, the first chair of Duke University’s Department of Botany. At that time, the garden was an extensive fern collection to honor professor Blomquist’s extensive knowledge of native ferns. The collection was about one-quarter of the size of the present-day garden.

Bloodworth’s tenure as curator of the Blomquist began in 2002. By that time, the garden had expanded beyond ferns to include other types of plants native to the southeastern United States. The collections were well established, but Bloodworth was excited to put his spin on things. His background was in forest ecology, landscape design and carpentry.

McNabb Family Bridge and Stream. Photo by Rick Fisher.

Since his arrival, Bloodworth has worked to advance and evolve the Blomquist Garden in several ways. One of his first goals was to incorporate signature hardscapes that would complement and enhance the existing landscape elements. When planning for these projects, Bloodworth is deeply thoughtful with his aesthetic. From the material type and origin to the structural design, everything has to have a reason for being used.

One recent project is the McNabb Family Bridge and Stream. The integration of the wood and metal in the bridge serves both a functional and aesthetic purpose, tying together nature and man-made materials. The wood was locally sourced  southern reclaimed sinker cypress, and the metalwork, integrating sculptural accents inspired by native species, was created by a local artisan.

Close-up of metalwork on the McNabb Family Bridge. Photo by Bob Ayers.

“Everything has a purpose. There are stories everywhere, in every element of the design,” Bloodworth says. 

This same philosophy encompasses the horticultural goals that Bloodworth has for the Blomquist. “Just like every landscape architecture design decision you make has a story behind it, so does every planting decision that you make.”

Bloodworth wants the garden to communicate the idea of “conservation horticulture” to its visitors. He takes into account ecosystem science and wildlife habitat design when creating new spaces. His aim is to create a “museum in the woods” to help visitors understand that they are in a botanical garden with unique and special collections, and he uses educational signs to interpret the space and help people appreciate what they are seeing and experiencing.

A male red-bellied woodpecker in the Blomquist. Photo by Stefan Bloodworth.

One of the “exhibits” in Bloodworth’s museum is the Steve Church Endangered Species Garden. Created in 2004, this collection of plants aims to educate people about the importance of conserving rare species. Most of the species in the collection have a sponsoring organization or a custodial partner, such as a fish and wildlife agency or a botanical garden, which is responsible for monitoring and actively conserving these plants in the wild. The sponsoring organizations will also take action as needed to promote the protection of the species’ natural habitats and ex-situ conservation. Visitors can learn about these organizations from interpretive signs in the Endangered Species Garden. Smartphone accessible QR codes included on the signs link visitors with in-depth information about each species, including the names of the groups charged with their care.

Bloodworth believes that with its more than 300,000 visitors each year, Duke Gardens has a unique opportunity to teach people about the importance of plant conservation and connect visitors with the organizations working to protect these disappearing species. More information about plant conservation and sponsoring organizations can be found on the Center for Plant Conservation website.

Starry rosinweed. Photo by Sue Lannon.

The Blomquist Garden of Native Plants is a special space any time of the year. Because of the garden's unique collections and wildlife, dogs and bicycles and not allowed. We hope you'll take a stroll through this “museum in the woods” on your next visit to Duke Gardens!

Seed Collecting for Biodiversity and Conservation

By Sarah Leach Smith
Visitor Services Coordinator

It was a cool, gray day in late October. Leaves were starting to change color, there were more seed heads than blooms in the Gardens and the morning was chilly enough that I needed a jacket. While this may be prime time for hot chocolate and fluffy scarves, it is also the optimal time for seed-collecting in central North Carolina.

On this day, I excitedly joined Horticulturist Annabel Renwick and Plant Collections Manager Beth Hall on a seed-collecting trip around Orange County. They were gathering native plant seeds for use in the new Piedmont Prairie, located in the Blomquist Garden of Native Plants. I had no idea what a seed-collecting trip entailed, but I was looking forward to finding out.

We started the day in Chapel Hill, visiting our friends at the North Carolina Botanical Garden.  We had a nice time chatting with our counterparts – seed program coordinator Heather Summer, greenhouse and nursery manager Matt Gocke and curator of habitat gardens Chris Liloia – and it was a treat to briefly stroll through the gardens. The fall color is looking fantastic! Heather sent us on our way with two species of seeds we were seeking, Symphyotrichum concolor (eastern silver aster) and Clematis ochroleuca (curly heads).

Our next destination was a great hidden gem. Niche Gardens is a mail-order and retail nursery near Chapel Hill that specializes in nursery-propagated plants. They have a unique selection of wildflowers and native plants, so they were a natural stop for us on our trip. Annabel spoke with Lauri Lawson, who helped us purchase several native species: Rudbekia laciniata (cut-leaf coneflower), Symphyotrichum cordifolium (blue wood aster) and Scutellaria incana (hoary skullcap). We loaded the flats into the truck and were off.
 
For the rest of the afternoon, we cruised around rural Orange County scouting roadsides for wildflowers in seed. Armed with brown paper bags and sharpies for labeling, we walked along the road and through ditches to find our treasures.

“I was particularly excited in finding such a rich vein of wild flowers,” Annabel told me when we returned to Duke Gardens. One of the highlights of the roadside collection was finding Solidago rugosa (wrinkleleaf goldenrod) in seed. Gathering seeds can be a waiting game, Annabel said. “I have one more outing to collect seed, and I have been waiting for several flowers to go to seed.” Annabel’s wishlist includes Solidago bicolor (white goldenrod), Symphyotrichum grandiflora (large flowered aster), Symphyotrichum puniceum (purple stemmed aster) and Silphium asteriscus (starry rosinweed).

Why go to the trouble of collecting seed from roadside ditches? For Annabel, it’s important that the Piedmont Prairie has “a sense of place," she says. "We want it to contain the progeny of plants whose parents populated the roadsides of this region before there were roads.”

Additionally, growing plants from seeds ensures genetic diversity, unlike asexually-propagated cultivars. Creating a prairie landscape rich in biodiversity is one of Annabel’s primary goals.

Joining Annabel and Beth was a wonderful experience that will cause me to forever look at roadsides in a different way. We are in an area that is so rich with native plant species! We’re excited to be part of this conservation effort and hope you make time to enjoy the Piedmont Prairie on your next visit to Duke Gardens.