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Magnolias in bloom

Published: Friday, January 25, 2013 at 3:00 a.m.
Last Modified: Wednesday, January 23, 2013 at 3:34 p.m.

They are the botanical equivalent of a Southern belle. With their voluptuous blooms in garden party colors, magnolia trees are as iconic to the Deep South as mint juleps.

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Magnolia campbellii, two flowers at the San Francisco Botanical Garden.

David Kruse-Pickler

Facts

MAGNOLIAS AT SAN FRANCISCO BOTANICAL GARDEN

The Botanical Garden is celebrating its prized collection through mid-March with a series of events and walks, including free docent tours every Saturay at 2 p.m.
Special Guided Tours: Led by Curator Don Mahoney or magnolia expert and docent Dr. Joe Barbaccia. 1-3 p.m. Feb. 16 and March 3. $15.
Magnolias by Moonlight: Docent-led tour of the garden during the full moon to experience the fragrant blossoms. 6-8 p.m. Feb. 25 and March 25. $15.
Magnolia Mixology: Mixologist H. Joseph Ehrmann, owner of San Francisco's Elixir bar, teaches how to blend gathered herbs and spices form the garden with premium organic spirits to craft two concoctions. 5-7 p.m. Jan. 31. $125.
Pencil Drawing: Practice mixing and layering color and exploring special techniques for drawing magnolias, camellias and rhododendrons. 10 a.m. to 5 p.m. Feb. 21. $90.
Garden Interpretation Stations: Set up throughout the garden to field questions and offer more in-depth information. 1:30 p.m. to 3:30 p.m. Sundays through March 17.
Secret Garden Magnolia Scavenger Hunt: Follow the clues for materials to create a secret art projects. Ages 5-12. 1-4 p.m. March 9. Free.
Where: The garden is at 1199 9th Ave. at Lincoln Way, San Francisco. If you visit stop at the kiosk for a “Magnificent Magnolias Highlights Walk.” (415) 661-1316 or sfbotanicalgarden.org.

Facts

SONOMA COUNTY MAGNOLIAS

While the San Francisco Botanical Garden has the greatest collection of magnolias for conservation purposes outside of China, Quarryhill Botanical Garden in Glen Ellen is only a few notches down on the list.
But unlike San Francisco, which has magnolias from Asia as well as Central America and the southeast United States, Quarryhill is focused strictly on East Asian varieties collected in the wild by Executive Director Bill McNamara.
Within the 25-acre garden, (located on Highway 12 near the Arnold Drive intersection and open daily from 9 a.m. to 4 p.m.), are two very rare ones, the Magnolia sinica and the Magnolia grandis.
The sinica is one of only two in the US, and one of only about 50 remaining in the world. Quarryhill's nursery has so far successfully propagated only six seeds. The grandis is native to only a few places in southern China and one of five magnolias listed as "urgently in need of conservation action" by the Kunming Institute of Botany of the Chinese Academy of Sciences.
Gardeners looking for something for their own landscape might visit Garden Delights Nursery in Petaluma. Erik Sumiharu Hagiwara-Nagata is passionate about plants and has assembled a nice selection of deciduous magnolias with a variety of characteristics, from those with star, chalice, tulip, cup and saucer-shaped flowers and pendulous flowers that look like hanging lanterns (2115 Adobe Road, Petaluma. 585-9010, hanascape.com).
Sonoma Horticultural Nursery in Sebastopol is also a big destination for magnolia lovers. The nursery specializes in magnolias and companion plants like rhododendrons, a distant relative, azaleas and other shade-lovers.
Owner Polo de Lorenzo first started his eight-acre demonstration garden in 1976, home to some 30 mature specimens. He has more than 70 varieties of magnolia in the nursery, including the Cambellii 'Strybing White' that first grew from seed in San Francisco.
The biggest group he has are the denudatas, hybridized by Tom Gresham near Santa Cruz. They are typically white, sometimes with a little pink and are among the most popular for the Bay Area climate. Stellatas also are popular for the Bay Area and easily found. (3970 Azalea Avenue, Sebastopol. 823-6832 or sonomahort.com.)
For success, de Lorenzo recommends planting magnolia with a good layer of bark mulch to help retain moisture and provide needed acidity to the soil.
- Meg McConahey

But while about 10 percent of the world's magnolias do hail from the Southern U.S., they really don't like the tropics. Some 80 percent of magnolias are native to China and India, and thrive in more temperate climates.

They grow well in the North Bay and the greater Bay Area; in fact, conditions are so hospitable that foggy San Francisco is home to the most important collection of magnolias outside of China, and the fourth most important conservation collection in the world. Who knew?

Of the 70 different varieties and 160 individual specimens of magnolia gracing the 55-acre San Francisco Botanical Garden in Golden Gate Park, nine are included on the “Red List” of the International Union for Conservation of Nature, a global environmental organization with 11,000 experts who help set the standards for identifying the risk faced by both plant and animal species.

Among those is the small, deciduous and critically endangered Magnolia zenii. Listed as “critically endangered,” there were only a few left dozen of these found when the variety was first discovered in China in 1931.

This extraordinary collection is beginning to burst into flower now, visual relief in winter when precious little is in bloom. Some 100 specimens will put on a show before dropping their blossoms in a lush carpet of color that is almost as beautiful on the ground as on the branch, said chief curator Don Mahoney.

The garden is celebrating its impressive collection from now through March, with several special events, including monthly guided walks through the magnolias “by moonlight,” and classes in pencil-drawing magnolias and mixing magnolias into tasty cocktails using two of the garden's famed varieties of magnolia. There are also kids' activities like mobile-making and a scavenger hunt, all tied to what has become the “signature flower” of the San Francisco Botanical Garden.

But more serious horticulturists and backyard gardeners will be content with a self-guided or docent-led tour of the magnolia collection, to view some of the garden's most significant trees as well as browse among others more commonly found. If you're dreaming of planting one, the best time to shop is when they are in bloom.

It's a a trek that will take you off the main paths to manicured spots like the Japanese Moon-Viewing Garden, with a pool that reflects the full moon and lush corners that are almost primeval in appearance. Paleobotanists regard the magnolia family as one of the oldest flowering plants, with fossils dating back nearly 100 million years.

All told, they consume several acres of the garden, and are most likely to be found, said Mahoney, with classic companion plants like camellias, rhododendrons and ferns.

What makes a blooming magnolia so magnificent, he stressed, is the fact that the flowers bloom on naked branches; no greenery dilutes the sight.

“A big old one can have 4-5,000 flowers and it's just incredibly colorful,” said Mahoney. He will lead a public tour on Feb. 16, pointing out important highlights, like the red-listed Magnolia amoena, which Sen. Dianne Feinstein brought back from an official visit to Shanghai in 1984.

“It's white with dark purple bands in it,” said the curator, who oversees some 8,000 different plants from around the world. “It's very exquisite, a piece of art.”

The magnolia obsession started with Eric Walther, a protege of Golden Gate Park founder and 50-year superintendent John McLaren. Walther procured seed of the species campbellii from Darjeeling, India and planted it in the park, later moving it to the new arboretum. In 1940, not long after the park opened, a campbellii bloomed, the first ever to flower in the U.S., with massively majestic flowers, perhaps the largest of any magnolia. (Magnolias are trees that demands patience. It can take a seedling 20 years to bloom.)

The horticultural event drew throngs to the new arboretum, lining up to view the tree blooming behind a wooden fence.

Park visitors can still see that tree, which last year produced flowers measuring 13 inches across, as well as other venerable survivors, like the Magnolia campbellii 'Strybing White,' at 80 feet the largest in the park and producing an unexpected white bloom.

You can reach Staff Writer Meg McConahey at meg.mcconahey@pressdemocrat.com or 521-5204.

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