Wednesday, June 4, 2014
LOSING YOUR LAWN
Friday, March 16, 2012
FALLEN FOREST

From March 20012 issue of Arroyo Montly Magazine
When thousands of trees toppled in last November’s fierce windstorm, it was a reminder that urban trees, those gentle giants, can pack a powerful punch. Pasadena and Altadena are still littered with stumps, uplifted sidewalks and orange cones. The event has prompted soul-searching among arborists and tree lovers over the challenges of sustaining urban forests.
The loss of so many mature trees — more than 1,500 in Pasadena alone --- isn’t just an aesthetic issue; it means hotter, more polluted neighborhoods for years to come. “Large trees, particularly conifers, are like giant air filters,” explains Rebecca Latta, a former Pasadena tree superintendent. “They intercept large particle pollution that can get into your lungs.”
It’s a calm January day, and Latta is surveying some of the damage in north Pasadena. She examines the slanting 8-foot-tall stump and exposed roots of a deodar cedar. A resident has wrapped the tree with green-and-white barricade tape reading “killer tree.” “The winds were coming from the north and pulled the root plate up,” says the consulting arborist and oak specialist based in Glendora. “You can see the roots came up a long way, so there had to be tremendous force placed on top of this very tall tree.” Indeed, wind speeds approached 100 miles an hour in the unusually destructive storm; meterologists considered it a ferocious variation on the gentler and warmer Santa Anas typical of the season.
Latta notes the winds especially “devastated the really tall trees — Canary Island pine, deodar cedar, stone pine.” Some trees probably toppled simply because of the velocity. But the demise of others can, at least partially, be attributed to the challenges of growing trees in parkways. “Street trees have to be maintained in a situation where they have limited root space,” says Latta. “And, in some cases, the trees will pull up the sidewalk, curb and gutter, so those trees will have their roots pruned when new sidewalks are put in.” That makes trees less stable.
Inadequate watering regimes also threaten both street trees and their brethren in home gardens. That’s because trees and lawns have fundamentally different water requirements, as horticulturist Barbara Eisenstein is quick to point out. “Watering once or twice a week for 10 minutes is not good for trees,” she says. “The water doesn’t soak down very far; trees want a much deeper root system and you want to water them infrequently and really deeply.”
The storm was so intense at Eisenstein’s South Pasadena home — small branches flying everywhere, windows blowing open, dust swirling around the house — that she worried her mature avocado and deodar cedar would crash onto the Craftsman home. They didn’t, perhaps because of the care she’d given her trees. Eisenstein had removed the lawn around both trees and replaced it with mulch, which allows for less frequent watering and prevents root rot. Another tip: Cap or remove irrigation systems around trees so they don’t spray the trunks. “There should be no watering [next to the tree],” says Latta, “If the soil is too wet or the soil is compacted you don’t have enough oxygen in the soil or the exchange of gasses that tree roots need to be healthy.”
Pasadena is hiring a consultant to undertake a storm post-mortem, analyzing how its street tree practices might be improved. The findings are expected to be released to the public in the spring. Meanwhile, Forestry Superintendent Kenneth Graham says, the city hands out care guidelines to residents when workers plant new street trees, advising, among other things, “not to grow any groundcover adjacent to tree trunks.” He notes that the city trims and inspects street trees every five to seven years, depending on the kind of tree. Latta says that for some trees, that’s not often enough.
And many trees, both municipal and residential, suffer from sloppy pruning. A lot of cities have cut their tree maintenance funds, and Eisenstein says they often contract with companies that charge less and aren’t as diligent. Pasadena, however, has increased its street tree budget in the last decade.
Perhaps the worst offender is Southern California Edison, which prunes — no, hacks --- trees near power lines, lopping off their tops in a bad buzz cut. “Trees should never be brought down, called ‘heading back’ or ‘topping,’” Eisenstein says. “As soon as you cut a branch in the middle like that, it sends out multiple shoots that aren’t attached to the stem very well.” The new shoots are weaker and the dense regrowth creates more wind resistance.
For homeowners, finding a good tree service can be a challenge. Latta says even she struggles to find qualified crews. She recommends making sure a certified arborist supervises any pruning and that the arborist doesn’t leave your job site until the crew is done cutting. It also helps to hire a consulting arborist who specializes in the tree species you have.
As Latta continues her tour, she points out more stumps in Altadena, then drives by a spot where trees blown over in a previous storm have not been replaced. Pasadena officials say they’re optimistic they can secure grants and other funds for replanting, although they acknowledge the city faces financial constraints. But Latta wonders aloud whether L.A. County will have the money to reforest Altadena. “All these cities --- Pasadena, Altadena, Arcadia, La Cañada --- have really amazing urban forests,” she muses. “I think the legacy we leave our children is to replant and to maintain the trees we have so we don’t lose them.” And even if the fallen are replaced, it will be decades before the saplings grow into the giants that stood before the storm.
Wednesday, April 20, 2011
States Struggle to Rein in Runaway Garden Plants

Tuesday, March 1, 2011
Flights of Fancy: South Pasadena Butterfly Garden

SWALLOWTAILS
In addition to the giant swallowtail, two others frequent local gardens. Named for the tiger-like stripes on their yellow wings, Western Tiger Swallowtail (Papilio rutulus) will drink from a variety of plants commonly found at nurseries, including lantana and aster family plants such as zinnia. Eisenstein grows native seaside daisy (Erigeron glaucus) and a variety of sunflowers. These swallowtails deposit their eggs primarily on sycamore trees, but they also use poplars, cottonwood, willows and alders.
The anise swallowtail (Papilio zelicaon) is also abundant here, because exotic sweet fennel (Foeniculum vulgare) has become a roadside weed and wildland invader. Skip the fennel; attract it with native plants from the carrot family.
COMMON BUCKEYE
Despite the name, these small brown butterflies are uncommonly lovely. Their wings are adorned with large eye-like spots in a kaleidoscope of blues, yellows, pinks, orange and black. “One of the reasons buckeyes are still relatively common in Southern California is because their caterpillars eat members of the snapdragon family,” says Karner. He adds, don’t panic if your snapdragons get chewed up. The plants will rebound—perhaps growing even more vigorously—and know that “you’re going to get some nice butterflies out of the deal.” Eisenstein’s garden features another buckeye host plant—native monkey flower (mimulus species).
LADIES
Painted lady (Vanessa cardui) is sometimes called the cosmopolitan because it’s thought to be the most widespread butterfly globally. This small orange and black insect migrates into Southern California from Mexico in late winter/spring. It’s the one school kids rear in classrooms. Among the plants that host its young are lupines, mallows—even a vacant-lot plant called cheese weed--and thistles. Native and exotic mallows are easy to grow. Lupines provide a gorgeous blue accent in a native plant garden; they are nature’s complement to orange poppies.
Resident West Coast ladies (Vanessa annabella) will frequent the same plants. Both species sip from sunflowers and buckwheats (Eriogonum species). Eisenstein grows California buckwheat. It sports little orbs of creamy white-to-pinkish flowers that dry to a rust color.
CLOUDLESS SULPHUR
This pretty pale yellow butterfly has become rare in recent years. It depends on native cassia and senna plants. The exotic ones found in conventional nurseries don’t do the trick, according to Karner. So ask your local nursery to order the natives, or visit the Theodore Payne Foundation in Sun Valley or Rancho Santa Ana Botanic Garden.
MONARCH
These charismatic orange and black butterflies only deposit their eggs on milkweed plants. The black, yellow and white-striped caterpillars nurse on the plants’ alkaloid sap, which makes them toxic to predators. Exotic milkweeds are readily available, but some research suggests they leave the butterflies more vulnerable to parasites than the natives do. A good source for milkweed seed is Butterfly Encounters.com.
When positioning milkweeds, keep in mind that some are not beauties, and the voracious caterpillars will defoliate them. It’s the butterflies that dazzle.
GULF FRITILLARY
This pumpkin-colored butterfly, with black and silver accents, is native to Mexico and the Southeastern U.S. The grey caterpillars brandish horizontal orange stripes and black spines. The insect moved into coastal California when its host plants—passion vines—became popular in gardens. Avoid blue crown passion flower (Passiflora caerulea): it’s a weedy plant that can escape gardens and damage wildlands.
Wednesday, February 23, 2011
Butterflies
Tuesday, January 4, 2011
Milkweeds for Monarchs

Dwindling monarch butterfly populations have prompted some gardeners to pepper their landscapes with milkweeds, the various plants in the Asclepiadaceae family on which monarchs lay their eggs. Chubby, zebra-striped monarch caterpillars gorge themselves on the plants' milky alkaloid sap, which makes them poisonous to birds.
The question for many isn't whether to grow milkweed, but how -- and which kind.
In Connie Day's Santa Monica garden, a tiger-colored monarch spars with another butterfly, chasing it from a patch of milkweeds.
"The challenge is keeping the food here," Day says, noting that a few monarchs can defoliate a plant in a couple of weeks.
Read the rest of this story in LA Times Home.
Wednesday, November 17, 2010
Late Fall In Our Garden


Wednesday, November 10, 2010
Roses: The Fruits of Neglect

Sunday, September 12, 2010
Trumpet Zucchini

Sunday, July 11, 2010
Summertime...


Sunday, May 2, 2010
Small Wonders


Wednesday, April 21, 2010
Runaway Plants

Periwinkle (Vinca major) hails from the Mediterranean. Let loose in parts of Southern California, it smothers virtually all of the wildlife-supporting native plants in its path. California is home to many indigenous plants found nowhere else on Earth. Many are at risk of extinction. The main culprit is urbanization, but weedy exotic plants — even some that residents buy for their gardens — often share the blame. Able to rough it in the wild, runaway plants can throw entire ecosystems out of balance.
Mexican fans are the remarkably tall (up to 100 feet), skinny palms with fan-shaped fronds that have towered over much of the city’s built environment for more than a century. More conspicuous than stars in L.A.’s washed-out night sky, some palm constellations have even been dubbed historic-cultural monuments.
Although other palms have sneaked into the scene, Nicholas Staddon, director of new plants for Monrovia Growers, says Mexican fans are still popular and “very valuable — it’s fast-growing and has a wonderful tropical look.” No primadonna, aptly named robusta thrives in a couple square feet of dirt amid a sea of concrete, even roots in sidewalk cracks.
But the region’s palmy past is seeding trouble. Click over to read the rest of my LA Times story.
Most arrived with 19th century settlers and livestock (as contaminants in feed or lodged in animals’ coats, for example). But in recent years, ornamental grasses have joined the fray.
“Grasses are useful in a landscape,” says Jim Folsom, director of botanical gardens at the Huntington, “but by nature they are invasive; being a grass generally means being able to cover a lot territory fast.”
Saturday, March 27, 2010
Happy Days


Friday, March 19, 2010
Reaping

- various lettuces
- arugula, both the annual and spicier perennial
- sorrel--just a few leaves cut into strips (chiffonade for you culinary types)
- herbs: parsley, chevril, cilantro
- carrots
- tiny florets of raw broccoli. I'm usually not a fan of raw broccoli, but the fresh stuff is delish
- pea pods, cut in 3rds (yes, I love those culinary scissors)
- roasted beet
- beet greens, in strips add a nice crunch
- garnish of these edible flowers: arugula, rosemary, nasturtium & manzanita
- I drop (cut) basil leaves into dressing of 1/2 olive oil, half balsamic vineagar

Saturday, February 27, 2010
Garden Show Preview


Among the Aussies Morganelli pointed out:
Correa pulchella (pictured above);
One of several evergreen shrubs commonly called Australian fuchsia. Little bell-shaped flowers—pink to reddish orange-- dangle from its branches. “It’s a great border shrub,” says Morganelli, “and a great accent you can pepper in, even a wonderful hedge.”
Grevillea ‘Wakiti Sunrise’ (pictured at article top)
This is a cultivated plant (a cultivar) bred from one of the 250 plus species of wild Grevillea. It unfurls intricate clusters of hook-shaped, salmon-colored blossoms. “If you want to get rid of your lawn--and don’t have kids or a dog,” says Morganelli, “look at some of these low-growing shrubs.” She also admires the yellow-green color of the foliage.
Acacia merinthophora
The zigzag wattle derives its name from its stems, which zigzag between its flowers--little yellow puffs accompanied by a single pine needle-like leaf (technically, a leaf-like structure called a phyllode). Zigzag’s branches spill out in a weeping fashion. Arboretum CEO Richard Schulhof advises planting this uncommon beauty in front of a wall “so you can see its shadows and the finery of the foliage.” (Note: Some other acacias—cyclops ,longifolia, and decurrens--are invasive; do not plant them.)
Dodonaea viscosa ‘Purpurea’
This Dodonaea is native to the American Southwest and Hawaii, but most of its close relatives, which are commonly called hop bush, hail from down under. Purpurea can be grouped together for a fast-growing privacy screen. Morganelli advises pairing them with showier plants: “Take the purple-bronze color of the leaves and bounce them off some other, low-growing greens.”
The Native Plants Morganelli recommends include
Penstemon spectabilis
Also known as showy or royal penstemon, this herbaceous plant dazzles with three- to six-foot tall flower stalks, covered with dozens of blue, purple or pink flowers. “I think of penstemons as my answer to foxgloves,” says Morganelli.
This sage is popular with native plant gardeners. It smells delicious (a mélange of honey, lemon, mint), and can fill a difficult niche: dry shady areas. There’s a reason this red-blooming plant is called Hummingbird sage, says Morganelli, “you’ll see hummingbirds drink from these all day long.”
That’s a fancy name for a modest plant known as narrow-leaved Milkweed. “It’s not a beautiful plant all year,” says Morganelli, “but it’s a food source for monarch butterflies.” She advises planting it near the back of a bed, and waiting for the gorgeous black and white striped caterpillars to turn up.
Scientifically, this group of plants goes by a tangle of names, but they are easily identified as monkey flower. Hikers recognize some of them from local trails. Some can be hard to grow and are short-lived; Morganelli recommends the yellow and pale orange shrubby kind.
Monday, February 22, 2010
Now Blooming




Saturday, January 23, 2010
Sweet Greens


Saturday, December 12, 2009
In Praise of Lili


Sunday, December 6, 2009
Rain Captured

Thursday, November 26, 2009
Winter Veg
