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Every gardener has a favorite aha moment - when an obvious truth sinks in that didn’t seem
all that obvious earlier. One of my favorite aha moments occurred when I grasped the
difference between California’s seasons and those on the East Coast. Yes, our winter occurs
in January-March and the summer in July-September, just as it does there. But that’s where
the similarity ends.
On the East Coast, in winter, plants are dormant, leafless, or dead. In California’s winter, plants get
plenty of rain, and their root systems grow like crazy.
In summer on the East Coast, plants grow lush green, helped along by periodic showers, high humidity,
and sunshine. In California’s desert-like summer, there is sun all right, but not a drop of rain.
Plants that do best in California know how to survive six months or more without water.
This simple but subtle fact is lost on many gardeners, especially those accustomed to the East Coast climate.
They go nuts trying to make sense of California’s seasons, wondering why a California garden needs so much
water in summer. Gardening books are of little help, most having been written by and for East Coast gardeners.
Happy are those who grasp the essential facts about California’s unique climate, and who learn to adapt
to California instead of forcing California to adapt to their ideas.
“Being from New York I always used to say that I missed the seasons back East,” recalls Barbara Springer
of San Jose. “What I didn't realize was that I was overlooking the seasons of California and trying to make
them fit into the East Coast model. I now have a new perspective where I look forward to each new ‘season’
of rains, germination and growth, blooms, seed collecting, and dormancy.”
Gardening with nature brings great rewards, not the least of which is a deeper knowledge of the place one
calls home. Anyone can create a lush summer garden by watering, watering, watering. The real challenge lies
in creating a garden that is appropriate to its environment, to its soil and its climate. Such a garden
thrives without consuming large quantities of scarce natural resources.
The secret to keeping a California garden looking beautiful through summer lies in picking plants appropriate
to the site. You can’t go wrong by choosing locally native plants, which are naturally adapted to your soil
and climate. California is blessed with a great diversity of native plants, which have unique evolutionary
mechanisms for staying alive during the long dry summer. Some like Holly-leaved Cherry grow extremely long,
deep roots even as seedlings. Others like the Buckeye go dormant by dropping their leaves as early as July.
Yet others like Sticky Monkeyflower reduce their rate of growth.
In this article, I will introduce you to five native shrubs and trees that will be, in your garden, the most
unthirsty of plants, adding greenery without requiring frequent water. Best of all, they will increase the
habitat value of your garden, attracting birds, bees, and butterflies. I am growing them all in my San Jose
home, and can vouch for their reliable, unfussy nature.
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Flat-top Buckwheat (Eriogonum fasciculatum) is a 3’ tall and wide shrub that grows all over
the state on hot, dry slopes. It does well in clay soils too. Its small linear leaves stay green the year
round. In summer, it is topped with white pompom-like flowering heads that are a magnet for butterflies,
bees, and flies of all kinds. I love visiting this bush in the late afternoon around 3 p.m. and watching
the buzz of activity.
By fall, the flowers turn a reddish-brown, easily deadheaded, if desired, or retained for the change of color.
Its large size and floppy habit make it suitable for placing in the back of large beds. Cutting it back to 6”
in late fall keeps the woody growth to a minimum and the plant looking its best the year round. A garden
visitor remarked that it would be a good alternative to the commonly grown Rosemary. For me, a true summer
favorite.
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The summer-blooming Flat-top Buckwheat (Eriogonum fasciculatum) attracts butterflies, bees, and flies
of all kinds. Looks nice, too.
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With its 3” shapely dark green leaves and mahogany stems, Coffeeberry (Rhamnus californica)
is easily the most handsome of shrubs in a garden.
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With its 3” shapely dark green leaves and mahogany stems, Coffeeberry (Rhamnus californica)
is easily the most handsome of shrubs in a garden. The flowers are not significant, but the large
berries are showy when red, ripening to black. Wherever there are maturing coffeeberries, in the wild
or in the garden, the birds are not far away.
Many selections are available. ‘Mound San Bruno’ is a compact variety. We are growing one from seed
collected from Barbara Springer’s Ranch up the hill from our house. Although it has not fruited yet,
it is one of the highlights of the front yard. Its lovely, upright shape is all natural, without any
help from pruning shears. Every California garden deserves one.
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Another plant in flower at this time is Narrow-leaved Milkweed (Asclepias fascicularis).
A 3’ tall perennial which dies back to the ground each winter, it is a favorite of butterflies
as a nectar plant as well as a larval host plant. The tiny white-pink flowers occur in dense umbels,
and draw butterflies like pins to a magnet. Added water can make it invasive, but clay soil and a
minimum of irrigation keeps it well-behaved. Give it full sun and sit back, and let the swallowtails
and monarchs beat a path to your garden.
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The tiny white-pink flowers of the Narrow-leaved Milkweed (Asclepias fascicularis) occur in
dense umbels, and draw butterflies like this Western Tiger Swallowtail.
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The Blue Elderberry (Sambucus mexicana) is a fast-growing tree that is covered with
sprays of cream-colored flowers in spring and pale blue berries in early summer.
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Walking along the Coyote Creek trail last year, we came upon a small, multi-trunked tree which
appeared to be the equivalent of an avian cafeteria. A variety of small birds were merrily darting
in and out of its shrubby crown. Closer inspection revealed this was the Blue Elderberry
(Sambucus mexicana), a local native that is covered with sprays of cream-colored flowers
in spring and pale blue berries in early summer. It can have a long flowering and fruiting season,
flowering on one branch, while fruit ripens on another, thus providing a reliable food source over
a long period of time.
What makes the Elderberry particularly suited for the garden is its amenability to cultivation.
Left to itself, it becomes a multi-trunked shrub. With suitable pruning of suckers, it can be trained
as a single- or double-trunked tree that can grow to 20 feet. I have stood next to a massive specimen
that could have been mistaken for a live oak! It can easily survive low water conditions, but it is
also water tolerant and fast growing. Our 2-year-old specimen is already 10 feet tall. It is winter
deciduous, so a good place to plant it would be to the south of a location where summer shade and
winter sun are desired.
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If, however, you want a tree that keeps its leaves year-round, I have an excellent suggestion.
This year, I had a near-religious experience, courtesy of Barbara Springer, who is herself a
native gardener and ranch owner. While hiking near her property in the east hills of San Jose,
we came upon a mature Holly-leaved Cherry (Prunus ilicifolia) in full flower.
This majestic specimen, easily 25’ tall, was growing on the slope of a canyon. Innumerable insects
buzzed busily about its white inflorescences, hovering and feeding, forming a veritable halo of
activity. It was a revelation.
This remarkable California native remains shiny green even at the height of summer. It does so
with the help of deep roots that can find water even when the surface is parched dry. Last year,
we transplanted several grown from seed, and had the chance to observe their roots closely.
A seedling barely an inch tall had a taproot a foot long. Now you know how this California native
succeeds where other water-challenged plants fail. On the flip side, its growth rate is slow.
You can help it along with periodic watering, but you’ll need to be patient and give it time to
reach its full size.
The cherries, while not appealing to humans, are loved by birds. Its branches, impenetrable to
large predators, create a safe space for our feathered friends. When young, this plant resembles a
dense shrub, and can easily be shaped into a hedge. As a tree, it casts a dark shadow and makes for
a good year-round shade tree.
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This 25’ specimen of the Holly-leaved Cherry (Prunus ilicifolia) was in full bloom
in April.
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There you have it - a few more plants to add to your garden without increasing your water bill.
Remember that all young plants, native and otherwise, require moisture to grow and get established.
If you plant in summer, you must water the young plants a few times a week until they are established.
Native plants do not achieve their full drought tolerant status until their 3rd or 4th year when their root
systems develop fully.
These plants are easily available at native plant nurseries such as Yerba Buena Nursery (Woodside)
(http://www.yerbabuenanursery.com)
and Native Revival Nursery (Aptos) (http://www.nativerevival.com).
It won’t hurt to check with your local nursery first; some like Payless Nursery (San Jose) do carry
a selection of native plants.
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Arvind Kumar has been growing native plants in his Evergreen garden for
three years. He volunteers at Lake Cunningham Park, introducing native wildflowers
and other plants. This article first appeared in the
New Neighborhood Voice, www.nnvesj.org,
a webzine for the east hills of San Jose. All the pictures on this page © Arvind Kumar.
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