Last week in this column we suggested creating a swale in your home garden to capture rain and practice effective water conservation. If you have been inspired to start planning a swale, you may be looking forward to the fun of selecting plants for this garden feature.
Note that our merciless summers require additional irrigation for even drought-tolerant native plants while they are getting established. A spare but regular drip-irrigation line for the first two summers will improve survival rates.
Cool-season grasses and herbs to line a grassy swale or the banks of a rock creek:
- Sedges (Carex species) and rushes (Juncus species) for sun
- Yerba buena (Clinopidium douglasii) for part-shade
Deep-rooted, larger grasses to anchor:
- Deer grass (Muhlenbergia patens)
- Native fescues (Festuca californica, F. idahoensis, F. rubrica)
- Creeping wildrye (Leymus triticoides)
Perennials that tolerate winter moist, summer dry conditions:
- Douglas iris (Iris douglasii)
- California fuchsia (Epilobium canum)
- Prostrate manzanita (Arctostaphylos uva-ursi)
- Buckwheats (Eriogonum species)
- Fleabane daisies (Erigeron species)
- Yarrow (Achillea millefolium)
- Common monkeyflower/aka sticky-monkey (Mimulus aurantiacus)
- Yellow monkeyflower/aka seep mimulus (Mimulus guttatus)
- California coneflower (Rudbeckia californica)
- Hummingbird sage (Salvia spathacea) and other salvia species
Drought-tolerant ferns for shade
- Polypody fern (Polypodium californicum)
- Western sword fern (Polystichum munitum)
- Wood fern (Dryopteris arguta)
Shrubs and small trees for banks
- Hybrid rockrose (Cistus skanbergii)
- Barberry (Berberis aka Mahonia pinnata)
- Toyon (Heteromeles arbutifolia)
- California coffeeberry (Rhamnus californica)
- Gooseberry (Ribes speciosum)
- Wood rose (Rosa gymnocarpa)
- St. Catherine's Lace (Eriogonum giganteum)
- Redbud (Cercis occidentalis)
- Mountain mahogany (Cercocarpus betuloides)
- Red twig dogwood (Cornus sericea)
- Ceanothus species
- Manzanitas (Arctostaphylos species)
UC Master Gardeners of Butte County are part of the University of California Cooperative Extension (UCCE) system. To learn more about us and our upcoming events, and for help with gardening in our area, visit our website. If you have a gardening question or problem, email the Hotline at mgbutte@ucanr.edu or leave a phone message on our Hotline at (530) 538-7201. To speak to a Master Gardener about a gardening issue, or to drop by the MG office during Hotline hours, see the most current information on our Ask Us Hotline webpage.
One approach to dealing with drought conditions in the garden is to turn to native plants that are well-acclimated to our local environment. Some gardeners new to planting natives may be concerned that these plants might require special care, but in general they need not worry. While some natives can be difficult in the garden, most are not, and many are very easy to grow. By far the best time for planting natives is mid- September through late winter. The weather is cool, nature helps with irrigation, and roots have time to grow before the weather turns hot again.
Jason Mills, owner of Ecological Solutions, suggests, “If you're looking for an evergreen shrub, why not try giving the local and less commonly used hollyleaf redberry (Rhamnus ilicifolia) a shot?” Hollyleaf redberry has small serrated leaves, resembling holly. It grows best in full sun or partial shade. The flowers are small and inconspicuous but develop into beautiful red fruit, which provide food for birds. It grows five to ten feet tall and needs no summer water once established.
Growing natives can be easy if you give careful consideration to the plant's cultural requirements. Mills states, “In the end it all comes down to putting the right plant in the right spot. We look to nature and try to match the conditions (substrate, moisture, light exposure) found in remaining intact habitats when we create our designs and implement native landscapes. When you get it right, you'll know, as they thrive for years to come with little to no water and maintenance and provide crucial resources for wildlife along the way.”
UC Master Gardeners of Butte County are part of the University of California Cooperative Extension (UCCE) system. To learn more about us and our upcoming events, and for help with gardening in our area, visit our website. If you have a gardening question or problem, email the Hotline at mgbutte@ucanr.edu (preferred) or call (530) 538-7201.
By T. Eric Nightingale, UC Master Gardener of Napa County
Fall is a wonderful time to be in the garden. The cooler air is reinvigorating after the long hot days of summer. Fall is also a perfect time to plant many California natives. Many have been dormant during the summer and will soon awaken and stretch their roots within the soil. These plants will grow through the wet days of winter, preparing to bloom brightly and beautifully in spring.
The soil itself seems to approve of fall planting. Once seemingly made of stone, the clay-heavy soils in our gardens will soon become manageable once again.
It is well known that native plants are hardy, often drought-tolerant options for our gardens. When considering California natives, it can be helpful to look at a more refined list of Napa Valley natives. We live in a large and ecologically diverse state, so focusing on local flora can make your gardening more successful. Napa Valley native plants include many hardy and beautiful choices, enough to provide for almost any garden need.
As winter approaches, many gardens lose much of their color. A great plant for color from summer through fall is California fuchsia (Epilobium canum). Its silver-green foliage provides an excellent backdrop for the bright orange-red flowers. It is a low shrub, sometimes prostrate, so it is ideal for bordering a walkway. California fuchsia spreads via seed and rhizomes, so you may end up with a splash of color where you hadn't planned it.
All through the winter we will be treated to the pink and white blooms of Stanford's manzanita (Arctostaphylos stanfordiana). This manzanita can be maintained as a shrub but will reach seven feet tall if allowed. Manzanita will not only add winter color to your garden but can also shade more delicate plants during the hot summer. Manzanita also provides berries and shelter for native wildlife. Look for Stanford's manzanita the next time you are out in the woodlands of Napa Valley and the surrounding area.
If you are looking for a vining plant, look no further than Dutchman's pipe (Aristolochia californica). Its unique blooms are white with red stripes and shaped like curved bells. Dutchman's pipe is a host plant for the larva of the pipevine swallowtail, a vibrantly colored yellow and blue butterfly. Wasps also like the plant, however, and will be drawn to the fruits of the seed pods. To foil them, remove the pods before they open or cover the plant with netting until you can collect the seeds. Due to the odd shape of the flowers, Dutchman's pipewas once thought to be carnivorous. This notion has since been disproven, however.
For a low-maintenance, drought-tolerant, worry-free groundcover, try purple needlegrass (Stipa pulchra). It is an unassuming yet amazing plant. This perennial grass grows readily in many types of soil, including the clay soils of Napa Valley. The roots can grow 20 feet deep, giving it incredible drought-tolerance. Purple needlegrassworks well with other native plants, but also helps to block and suppress invasive weeds. In 2004 it was designated the official State Grass of California!
My favorite native tree is the California buckeye (Aesculus californica). It grows large and sturdy, with wide, attractive leaves that provide much-needed summer shade. The blooms this tree produces are truly incredible: many small, cream-colored flowers grouped into long, impressive cones. This show will often last through spring and summer, until the tree drops its leaves as part of its summer dormancy. Toward the end of summer, large nut-like fruits will appear. While they somewhat resemble chestnuts, these fruits are inedible.
These are just a few options of the many native plants you can add to your garden. There are many helpful resources available to those new to natives. Calflora (www.calflora.org) is a website that allows you to search for plants based on criteria such as shape, native ecosystem and lifespan. The Napa Chapter of the California Native Plant Society maintains a list of native- plant gardens and nurseries (www.napavalleycnps.org).
I heartily encourage you to investigate the possibilities of native plants. By including them in your garden you not only benefit yourself, but also the many creatures that make up our local ecosystem.
Workshop: U. C. Master Gardeners of Napa County will hold a workshop on “Toxic and Carnivorous Plants” on Saturday, October 27, from 9:30 a.m. to 11:30 a.m., at the University of California Cooperative Extension, 1710 Soscol Avenue, Napa. Foxglove. Lily-of-the-valley. Wisteria. These common plants and many others are toxiix. Who knew? Sundew. Venus flytrap. Pitcher plant. Carnivorous, or so we've heard. Join the UC Master Gardeners and explore the fascinating properties that plants have to protect themselves and survive in inhospitable places.Online registration (credit card only);Mail-in/Walk-in registration (check only or drop off cash payment).
Master Gardeners are volunteers who help the University of California reach the gardening public with home gardening information. U. C. Master Gardeners of Napa County ( http://ucanr.edu/ucmgnapa/) are available to answer gardening questions in person or by phone, Monday, Wednesday and Friday, 9 a.m. to Noon, at the U. C. Cooperative Extension office, 1710 Soscol Avenue, Suite 4, Napa, 707-253-4143, or from outside City of Napa toll-free at 877-279-3065. Or e-mail your garden questions by following the guidelines on our web site. Click on Napa, then on Have Garden Questions? Find us on Facebook under UC Master Gardeners of Napa County.
By Cindy Watter, UC Master Gardener of Napa County
About 25 years ago, my next-door neighbor brought home a half-dead tangle of a plant that she called a passionflower (Passiflora). She planted it in a large trough and set to work spraying it lavishly with Miracle-Gro.
It must have been a case of the right plant in the right place because it soon tumbled over the fence and took over my yard. For the last quarter-century birds have scattered the passion fruit seeds, vines the size of boa constrictors have twined up my walnut tree, and the exuberantly beautiful blue passionflowers have provided a backdrop for family portraits.
Most importantly, the plant has provided habitat for the gulf fritillary (Agraulis vanillae), an orange butterfly that was introduced to the Bay Area from the South American tropics around 1908 and has now spread as far north as Sacramento.
There's something so cheering about looking out the window at a cloud of orange butterflies fluttering around the blue passionflowers. It is a delightful way to begin the day.
Butterflies are important pollinators, but most people love them because they are so pretty. The fritillary larvae eat the passionflower leaves, and it's fun to watch the caterpillars creeping on the foliage. (Children find this stage especially fascinating.) The Napa climate is generally hospitable to butterflies, and most plants they like do well here. It is not at all difficult to create a butterfly habitat in your yard.
Butterfly bush (Buddleia) blooms in a variety of colors, including purple, rose, yellow and cream. It likes well-drained soil and full sun, although some varieties thrive in partial shade. It is not unusual to see a buddleia covered with butterflies, enjoying its nectar and pollen while slowly waving their wings. Some Buddleias can easily reach 15 feet. They do spread; seeds travel through a neighborhood and sprout. If you are concerned about that, prune them to a height of 10 inches after they flower but before they set seed.
Many California native plants are irresistible to butterflies, and most natives need little water to thrive. The California wild lilac (Ceanothus) can be a shrub or ground cover, with blooms in an assortment of colors, although blue is the most common. They need almost no water in summer, although some fog-belt varieties appreciate a little moisture then.
The flannel bush (Fremontodendron), which sports butter-yellow flowers, is completely drought tolerant. The foliage can irritate skin (the leaves have a felt-like texture on the underside), so wear gloves when working with it and keep the plant away from paths. It is perfect against a stone wall or on a slope, and pollinators love it.
Another garden showstopper is the Matilija poppy (Romneya coulteri). This perennial can grow nine feet tall and makes me think of fried eggs, sunny side up. The flowers have white crepe paper-like petals, with a fluffy yellow center, and greyish green foliage. I had no luck growing them from seed, and no wonder: they propagate by way of rhizomes. Even then, Sunset's Western Garden Book recommends that you burn pine needles on top of a foil-lined flat of sprigs from the spreading roots before planting them.
It's much easier to buy a plant from a nursery that sells natives. However, all the fuss is worth it. Butterflies love Matilija poppy, it is truly spectacular, and it requires next to no care or water once established.
The California marigold (Tagetes lemonii) is another striking native that attracts butterflies. I first noticed this plant growing out of a crack in a Berkeley sidewalk a couple of years ago, and since then I have seen it everywhere. It is a shrub-like perennial, with golden-orange flowers and dark blue-green pointed leaves that smell like a combination of citrus, lavender and mint. It needs low to moderate water and looks wonderful with red poppies and blue salvia.
Mock orange (Philadelphus lewisii) is a native shrub that is covered with sweet-smelling white blossoms that butterflies can't resist. It is drought tolerant.
Many flowers that lure butterflies can be planted from seed. Try native milkweeds if you want Monarch butterflies in your yard. The showy milkweed (Asclepius speciosa) and Mexican whorled milkweed (Asclepius fascicularis) like the sun and, again, need little water. The purple coneflower (Echinacea) and sunflower (Helianthus) are also good choices, as are native yarrows (Achillea multifolium californicum and Achillea multifolium rosea).
Cosmos and zinnias are also easy to grow from seed and are good choices for attracting pollinators. Their flowers are of differing heights, so there is lots of movement from the butterflies as they consume nectar.
To create a true habitat, grow these plants in masses, not in isolated clumps. Make sure to have water nearby, as butterflies get thirsty. While I can't guarantee a visit from Lewis Carroll's bread-and-butterfly (last seen in Through the Looking Glass), many other varieties will enjoy your efforts, and you will love watching butterflies drift around your garden.
Master Gardeners are volunteers who help the University of California reach the gardening public with home gardening information. U. C. Master Gardeners of Napa County ( http://ucanr.edu/ucmgnapa/) are available to answer gardening questions in person or by phone, Monday, Wednesday and Friday, 9 a.m. to Noon, at the U. C. Cooperative Extension office, 1710 Soscol Avenue, Suite 4, Napa, 707-253-4143, or from outside City of Napa toll-free at 877-279-3065. Or e-mail your garden questions by following the guidelines on our web site. Click on Napa, then on Have Garden Questions? Find us on Facebook under UC Master Gardeners of Napa County.
- Author: Michael Bains
The Rancho Santa Ana Botanic Garden (RSABG) is an 86-acre (34.8 hectare) garden in Claremont, California surrounded by the Claremont Colleges. It is roughly 35 miles east of Los Angeles and is my favorite botanic garden in Southern California. The focus of the garden is on California natives and contains natives starting from southern Oregon to western Nevada and extends well south into Baja California.
The garden was originally founded in 1927 by Susanna Bixby Bryant, who established the garden on 200 acres set aside on her family's Orange County ranch and has always been focused on emphasizing California flora.
In 1951 the garden moved to its present location in Claremont which is in Los Angeles County. This was also the time the garden became affiliated with The Claremont Colleges, a relationship that continues today and offers graduate degrees in botany. The garden contains about 2,000 taxa of the approximately 6,000 native plant taxa in California.
Upon arriving at the garden, you are immediately met in the parking lot by several California native trees giving much needed shade during the summer months. Near to my heart are two California Black Walnuts (Juglans californica) shading a short walkway leading to the nursery. They are near to me as I have recently planted one in my own garden in a section I'm devoting to California natives. They are, also, endangered, as their natural habitats become more and more encroached upon by development and grazing.
The garden is broken into 3 main areas. The Indian Hill Mesa is a flat-topped clay hill that sits a short uphill walk above the rest of the garden. Below the Mesa, is an area that runs to the east and leads to the third section that I lovingly refer to as the “North 40”, even though it's 55 acres (22.2 hectares). This area is the largest area and sits the furthest from the entrance.
The garden entrance is just below the Indian Hill Mesa. Here you are met with the beginnings of the desert garden which opens to the west to Fay's Wildflower Meadow. The meadow contains numerous types of wildflowers and is normally in full bloom starting in midwinter into the spring. Unfortunately, due to our recent drought, the meadow has not been able to reach its full glory in the recent past, even leading the garden to give this area supplemental watering. Many California wildflowers, such as California poppy (Eschscholzia californica), Lupine (Lupinus albifrons) and Mariposa lily (Calochortus clavitus) require a normal or even excessively heavy rainy season to bloom. California finally received a very wet winter to bring us officially out of our drought and created the first “super bloom” in a great while.
Continuing past Fay's Meadow Garden is the desert garden. Here numerous California desert natives can be found from the Mojave Desert down south into Baja California. There is a network of footpaths running through this area to explore different flora. The area contains Cylindropuntia acanthocarpa with its heavily spiked “clubs” and prickly pear cactus (Opuntia x vaseyi) among other delights. A little further back is the palm oasis consisting of a forest of California fan palms (Washingtonia filifera) surrounding a very small pond.
Past the Majestic Oak lies the northern 55 acres of the garden. This is a less cultivated area which allows for a much better sense of how the plants would look in the wild. Since there is minimal supplemental watering done, the best time to see this area is in the winter, especially after we have received some rain that begins, normally, in November.
The various plant communities are well marked; although, it is surprising how noticeable it can be at times moving from one community to the next. The area moves between Southern Chaparral, Foothill Woodlands, Northern Juniper Woodlands, Northern California Chaparral, amongst others. There are also more specific plant communities, such as Torrey Pines (Pinus torreyana),Joshua Trees (Yucca brevifolia), Junipers (Juniperus occidentalis) and my personal favorite of the Boojum Tree (Fouquieria columnaris). I'm quite certain the Boojum tree has appeared in at least one Dr. Seuss story. Most likely with Sam I am sitting on top of it. It's a single thick trunk that resembles a candle with short pencil-like branches sprouting from it. It's quite a sight.
Climbing back up from the Plant Communities is the Indian Hill Mesa. This area prior to colonization was inhabited by the Serrano. The Serrano people lived in the San Bernardino Mountains, which the garden is at the base of, and in the southern Mojave Desert. The Mesa contains the main structures of the garden and is where most of the garden's organized activities take place.
Throughout the summer, the Butterfly Pavilion is in this area, where native California butterflies are maintained for educational purposes as well as for sheer enjoyment. There is a party where the pavilion is opened and the butterflies released later in the summer. It is a lot of fun, just be sure to watch your step as butterfly squishing is frowned upon.
The Cultivar Garden is, as the name implies, an area that is a bit more “gardened” than other areas. It is meant to show some of the possibilities available with native California plants in a home garden. One of the areas of resistance that I have come across when speaking of natives is the perception that they do not look good in the garden. I think many people see them as weeds, since in their native habitat they go dormant in the summertime and are assumed, by many, to be dead. Combine this with our large nurseries that push non-natives onto the public, even invasive species, and our native flora is becoming scarce indeed. Showing what can be accomplished with minimal summer watering is part of the garden's public education.
The Mesa also contains Benjamin Pond, which is a small pond home to turtles, some koi, and whatever wildlife might need a drink of water. It's not uncommon to run across squirrels, rabbits and the occasional coyote wandering through the garden and the pond offers a water source, as well as, a nice cool place to sit after wandering around the garden on a hot summer day.
The Rancho Santa Ana Botanic Garden is also a research garden housing the largest store of California native seeds in the world. They conduct research, both in the laboratory and in the field, and are not immune to creating new cultivars of California natives. The research library contains nearly 40,000 volumes covering a wide range of topics. The garden is not supported by tax payer dollars and relies on grants, donations, admission charges and the Grow Native Nursery, which is open from October to May, when the weather is tolerable for planting.
This garden is quite a gem with a noble mission to save, cultivate and educate with regards to California native plants. I for one support the garden as much as I can and look forward to many years of watching it continue to grow.