I read this in the weekend paper and had to share: It looks like the population of San Diego County is doing so well in cutting down our water use that the water districts that supply us are suddenly feeling the financial pinch. Here’s a snippet from the San Diego Union-Tribune article:
“We don’t need to keep telling (customers) to do a better job,” said Bill Rucker, general manager for the Vallecitos Water District in San Marcos.
His agency’s sales fell 20 percent in the April-to-July period compared with the same period in 2008. To make up for the downturn, the district will leave some positions vacant and roll back conservation education.
During a meeting of the region’s top water managers in late August, “everyone was concerned about the lost revenues,” said Dennis Lamb of the Vallecitos district.
He said the decision-makers expressed support for allowing residents to continue watering their lawns and other landscaping a maximum of three days a week during the winter and spring, even though current regulations call for irrigation only once a week from November through May.
After reading reactions from the authorities I’m left wondering: Should it really be the water districts that are at the public forefront of water conservation? On one hand they’re telling us to do the right thing. But at the same time it’s in their financial interest if we don’t. Conflict of interest, anyone?
September 15 2009 | Categories: gardening | Tags: water conservation • water use | 8 Comments »
It’s easy to obsess about something you don’t have enough of, and water in California is one of those things.
On my recent trip to Northern California it was hard not to notice the dozens of signs stuck along the side of the interstate like so many Fox News soundbites-on-a-stick. I can’t tell you all the details about our water-use wars, but it has something to do with ongoing drought, overpopulation and a mandate to return water to natural watercourses in attempt to keep some small fish from vanishing from the face of the earth forever. As cheap, plentiful water is shut off or diverted to the big cities with more political clout, it’s easy to see that some farmers aren’t happy.
Back home, we’ve been reminded that water doesn’t just magically fall from the sky in plentiful amounts. The cast-iron water lines that supply the neighborhood have been failing, and the old lines are being replaced with new, bright baby-blue water mains. All summer long the street out front has been a construction pit as they installed temporary supply lines, cut through pavement to remove the old problem pipe, installed the new lines and prepared to hook up the houses to the never-ending font of the life-giving fluid. They’ve said that the street will be a no-parking zone for the next six weeks. Feels like it’s been forever already.
Of course that water supply isn’t without limits. The city has been on a mandatory water-reduction program since June, and I was happy to see that city water use dropped 20% that month. But as the novelty of saving water wore off, July’s numbers fell to 12%.
I’ve been trying to do my part. Overall I feel pretty good about it, but I’ve found myself falling off the wagon a bit myself. My new offense is this little number, a reverse-osmosis purification system to improve the water quality I can offer a new little collection of carnivorous plants (more on that in a future post). A reality with almost all R/O systems is that producing one gallon of good water generates several gallons of waste. I knew that going into it, but the reality of it is pretty stunning.
But instead of following the installation instructions, which outline in detail how you send all the wastewater down the drain through the special pipe fittings the manufacturer thoughtfully supplies with the unit, I modified the installation to aim the waste stream into a water bottle. The rejected water ends up being a little saltier and grosser that what comes from the tap, but it’s still cleaner than the graywater we’re recycling from our showers and is perfectly good for watering the plants that aren’t among the chosen few.
Now that I’ve lived with this setup for a couple of weeks I’m finding that lugging around five gallon water bottles can be a bit of a chore. Maybe I’ll rig a way to divert the waste directly to the garden. But that’s a project that will have to wait. Fall planting season is coming up, as well as a pile of house projects. And then there’s that new collection of plants to play with…
September 05 2009 | Categories: gardening • my garden | Tags: reverse osmosis • water purifiers • water use | 6 Comments »
We’ve taken a lot of measures to try to conserve water. Each water bill we receive gives us a chance to look at how well we’re doing. Compared to last year, this last bill showed a 40.1% drop for the two-month period of mid-May to mid-July.
To get to this point we’ve installed drip irrigation for most of the remaining thirsty plants, reduced the number of times a week the outdoor sprinkler runs, recycled water from the shower, mulched many garden spaces, and replaced some water-intensive plants with low-water or no-water selections. It’s helped that this has been a fairly cool spring and early summer.
Still, 112 gallons a day average total for a household of two people—one of us working 40 hours a week, the other mainly working out of the house—still seems a little on the high side. That’s enough water to flush a 1.6 gallon low-flow toilet 70 times per day. But compared to an American per capita average of something around 60-70 gallons for just indoor usage, I guess that’s not too awful for both indoor and outdoor use.
Hmmm, I wonder if we can get the usage down to less than 100 total gallons a day for the two of us. It might be a little tricky over the summer. But it should be totally doable once the weather cools.
July 29 2009 | Categories: gardening • my garden | Tags: water conservation • water use | 5 Comments »
My thanks to James Golden of View from Federal Twist for bringing to my attention a book that he thought would speak to this Californian’s attempts to garden in a land with little water. Penelope Hobhouse’s The Gardens of Persia traces the development of gardens in the rainfall-challenged area, beginning with the the earliest known garden for which we have an archaeological record, Cyrus the Great’s gardens at Pasargadae, which date to the 6th century, BCE.
That earliest garden featured a rectangular space divided symmetrically into smaller rectangles by two water courses that intersected at a 90 degree angle. It’s a basic formula that would develop through the centuries into the Islamic, Mughal and Moorish gardens which, in turn, went on to influence garden-making in Europe and beyond.
Cyrus’s garden used water in a way that treated it as a precious resource in a desert land but also showed off the fact that water was available to the owner of the garden, reinforcing the prestige and power of the ruler. Subsequent gardens in Persia continued to strike this balance. They used water in careful, strategic ways, treating it as the rare resource it was, often in narrow channels where evaporation would have been minized under the desert sun. At the same time they highlighted the power of the owner of the garden, and perhaps helped to conflate water’s life-giving powers with legitimacy of the ruler.
Here in San Diego, you can see an interpretation of a Persian-influenced Moorish garden in Balboa Park’s Alcazar Garden. Purportedly “patterned after the gardens of Alcazar Castle in Seville, Spain,” the garden is a 1935 design by local architect Richard Requa, built for the 1935-36 California Pacific International Exposition.
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Although I’ve never been to the Alcázar in Seville, a quick trip to the satellite overview of the original Alcázar gardens on Google Maps reveals the California garden to be a fairly loose interpretation of what you’ll find in Spain. But it retains strong overtones of traditional Persian gardens in its strong symmetry and thrifty use of water. (Garden sightseeing via Google Maps works really well for overviews of large gardens with strong structure. Take a look at Versailles or Isola Bella.)
In the Balboa Park garden each of the intersections of the main central axis and two perpendicular axes is celebrated by a small tiled fountain, six to eight feet across. Neither fountain throws water more than a few inches away from the fountainhead.
With San Diego’s current water restrictions, homeowners can’t have any sort of fountain that shoots water into the air. So even fountains that are as measured in their use of water as these are wouldn’t be permitted. But evaporation and water waste on this style of fountain is so different from what you’d have with civic fountains that are more like unplugged fire hydrants. (Think of the fountains in Las Vegas at Bellagio.) These little Moorish fountains celebrate water, they don’t waste it.
The garden features borders of clipped boxwood that outline the rectangles of the garden beds. Seasonal plantings rotate in an out of these bordered areas. Lavender, cosmos, and Shasta daisies were filling in the central rectangles on this July afternoon, with rudbeckia, penstemon, iresene, cannas, sunflowers and other warm-weather plants on the margins.
Are these plantings historically accurate? With the exception of the lavender, not at all. But chances are that if the Persian rulers were around today, they would used whatever materials were available to them, especially if they were plants that spoke to power and conquest over distant lands. Plants from all over the globe and modern hybrids would only serve to reinforce the viewer’s sense of the ruler’s power.
Penelope Hobhouse makes a similar observation about choice of plant materials in the Persian-influenced gardens at the Generalife in Grenada: “Archaeologists discovered that the garden must originally have been planted with low-growing flowers requiring little soil, although there were some deeper pits obviously made for shrubs, such as myrtle, and orange trees which had been described as growing there in the 16th century. After the excavations the soil was returned to the Acequia Court, and today modern annuals with no historical authenticity give a colorful display.”
If you were wanting to make a historically-correct Persian garden Hobhouse’s text list many other options throughout, including various roses, tulips, and several trees including white poplar, plane trees, plums, apricots, and apples.
Another resource for historical plants would be Ali Akbar Husain’s Scent in the Islamic Garden: A Study of Deccani Urdu Literary Sources, a study that I knew nothing about until I happened to see it sitting on the shelf next to the Hobhouse book in the library. This fairly academic but quite readable book concentrates on Mhugal gardens and provides a long appendix of specifically fragrant plants mentioned in garden texts. Although the focus is on texts from India, plants of of European origin make up a big part of the list.
Many of the selections don’t come as any surprise: several rose species, narcissus, violets, lavender, jasmine, mint, crinum, crocus, lilies, iris. But a couple would be surprising selections for gardens today: one of the stinking corpse flower species (Amorphophallus camanulatus) and cannabis (yes, that cannabis).
July 26 2009 | Categories: gardening • landscape design • places | Tags: fountains • historical authenticity • Moorish gardens • Penelope Hobhouse • Persian gardens • water features • water use | 9 Comments »
Here are some of the pitcher plants growing in my guilty pleasure bog garden, a small concrete container in which I have more than a half dozen of these sarracenias and as many sundews. The guilty pleasure part of this comes in when you consider that most of California is now in its third year of drought, and when you realize that none of the plants in the bog garden likes to dry out. And preferably they’d like to have their toes, though not all their roots, in standing water.
The genus Sarracenia is native mostly to wet zones in the Eastern and Southern United States (with one species into Canada). The ones I’ve tried are proving to be pretty easy to grow as long as they get sunlight and good-quality water. (I’ve probably mentioned before how mine get reverse osmosis water from the local water cafe instead of the hyperchlorinated bong water that comes out of most Southern California spigots. So far, providing good water has been the most difficult part of growing these plants.)
These plants, left to right, top to bottom:
- Sarracenia rubra
- S. leucophylla ‘Tarnok’
- S. x Dixie Lace
- S. alata
- S. minor
There’s also a closely related swamp thing that’s native to Northern California and Oregon. That plant, Darlingtonia californica, however, is as difficult to grow in most locations as it is stunning. If your can’t provide summer night temperatures below 55 degrees, don’t bother with it. You’ll kill it. I killed mine. Not all native plants makes sense to grow if they’re not native to your environment! (If you really must do what I did and not as I say, you could try constructing a special darlingtonia box like they do in Japan to lower temperatures around the plant.)
So what’s the water use? During the hottest months the little bog survives on three to four 5-gallon servings a month of water. That totals around 15-20 gallons for a space that’s about six or seven square feet, or about 2.1 to 3.3 gallons per square foot. I was a little shocked when I compared this number to what one source says it takes to maintain a typical lawn over the summer here in the coastal zone: 2.6-3.6 gallons per square foot.
Like, I can have a tiny little swamp garden for about the same amount of water it takes to support an equivalent spot of average lawn? And when you consider that most lawns are larger than six or seven square feet, I suddenly feel a little less guilty about my little guilty pleasure. And it made me look at lawns differently, that they’re just green swamps full of grass. I think I’d rather have my little bog garden.
(Full disclosure: We still do have a small patch of grass in the backyard which gets greened up for the big Fourth-of-July party and then neglected most of the rest of the year. It helps to have heavy afternoon shade like we do to minimize how much water a lawn requires. But when the guy who keeps it mowed and edged won’t do it any more (you know who you are), the lawn is history…)
July 02 2009 | Categories: gardening • my garden | Tags: bog plants • Darlingtonia californica • lawns • sarracenia • water use | 10 Comments »
While I was visiting San Diego’s Earth Day celebrations on Sunday, I took a quick detour into Balboa Park’s Botanical Building. It dates back to the 1914-15 Panama Pacific Exposition, and lays claim to being one of the largest lath structures in the world.
It was an odd feeling to leave the sun-drenched celebration of sustainable living outside and shift gears into the shaded, misted, and heavily watered Botanical Building. Humid and tropical, the interior reminded me of the over-watered vision of paradise that many people still think of when they think of California. Palms, cycads, begonias, orchids and other tropicals and subtropicals lazed in the shade or reached for the light dozens of feet overhead.
I usually go to public gardens and keep an eye out for things I’d like to have in my own garden. Gardens are amazingly democratic that way. If you look hard enough, you can often find some of the rarest plants, especially now with the web available to help source them.
In these days of looming water rationing, however, I felt a little queasy that the Botanical Building was showcasing all sorts of water-intensive plants San Diegans are trying not to fixate on so much these days. Our average temperatures enable the growth of these plants, our regular rainfall does not.
As I was thinking about that queasiness, I realized that many of the Balboa Park buildings nearby are museums that are full of unique objects or things that would be so far beyond my means to buy. The resources of these museums are focused on giving the public access to things and ideas they might not ordinarily encounter. I decided to try to think of the Botanical Building that way, as a sort of botanical museum. Although I could probably find many of its plants if I searched hard enough—and a few of them are actually totally common—I decided to try to look at and appreciate the plants as if they were museum objects I didn’t need to own.
And as my indignation started to lift, I started to be appreciative. Wasn’t it great that people in the city have a place where they can go visit some interesting plants but not have to worry about watering and caring for them? And the Botanical Building is free! If people decide to create little pockets of paradise at home, they don’t need to do their whole gardens this way. A little shaded corner could give you a lot of the same sense of coolness and shelter that the Botanical Building does.
In addition to the big lath house, Balboa Park offers a number of other plantings, including two succulent gardens. So it’s not like the park spends all its resources pimping an outdated vision of Southern California. And there’s value in seeing an old-school planting of this sort to help appreciate how local ideas about gardening have shifted.
So…back to my visit. Lots of things were in flower, but I ended up focusing on plants with variegated leaves that were used throughout the building. No forest would have so many variegated plants in so small a space, but this “garden museum” did a nice job in showcasing some of the botanical world’s interesting foliage patterns. Take a look…
(As usual you click on the images to enlarge them, especially if the signs in the thumbnails are too small to read…)
Cyclamen
Iresine herbstii
April 21 2009 | Categories: gardening • places | Tags: Balboa Park • Balboa Park Botanical Building • foliage • variegated leaves • water use | 3 Comments »
Our Governor has declared a drought emergency for California. The state rainfall and snowpack has been lower than average for most of the recent years, and reservoir reserves are dwindling. My county has been slightly over average in its rainfall this season but most of our water comes from the Sierra snows and the Colorado River. So this crisis is very real for us down here as well.
At this point we’re on call for a voluntary water reduction, but if the rains fail us people will be required to reduce their water use 20%, and then—if things get worse—by 40% or more. Since landscapes consumes the majority of the water, our county water authority has started an advertising campaign to deliver these water-overuse doorknob hangers with the Sunday paper. It’s also available online: here.
There are checkboxes for “Your sprinklers are watering the pavement,” “Your sprinklers were on during the rain,” “You have a broken sprinkler, and/or your irrigation system is leaking,” “Your sprinklers are on every day” and “Your sprinklers are on during the day.” My local shopping center is a huge offender in the first category and will be getting a hang tag from me.
But this program is mostly about sprinklers and watering habits and doesn’t really address the underlying causes. There really need to be big boxes saying, “Your huge expanse of grass and water-thirsty plants are attractive, but I’d like to show you how you can have a terrific-looking yard that requires almost no additional water,” or “This extremely well-watered golf course has no place in the desert that is San Diego County.”
The very green golf course in the local canyon bottom would get a violation tag if that were the case. At least, to their credit, they let the driving range go brown with the end of the rains. Maybe in California golf could morph into a seasonal winter sport, like skiing? Maybe I’m delusional?
March 01 2009 | Categories: gardening • landscape design | Tags: drought • water conservation • water use | 5 Comments »
“Policies aimed at reducing water applications can actually increase water depletions… Conservation programs that target reduced water diversions or applications provide no guarantee of saving water.”
These controversial statements are part of the abstract of an article by Frank A. Warda and Manuel Pulido-Velazquez that was recently published in the current Proceedings of the National Academy of Sciences of the United States of America. The study mainly looks at agricultural water use in the Rio Grande Valley, but some of its ideas and findings have relevance for our little backyard farmsteads. This is an open-access article, so you don’t have to have some magical levels of access to be able to read it online for free.
November 29 2008 | Categories: gardening | Tags: water conservation • water use | No Comments »
Happy Halloween to all of you!
Growing up, Halloween was always my favorite of the holidays. These were the years before everyone cloistered their children into parties surrounded by armed guards, and after the years when the celibrants really meant “trick or treat” when they said it—as in “give me some candy, otherwise I’ll throw eggs on your cars.” Ah. Kindler, gentler times…
I have three little selections to share with you today, ranked from mildy scary to dizzyingly horrifying.
Number one: Scary.
(The image to the left from the Orchids in Our Tropics web store [ source ])
In my orchid-growing days I was fascinated by plants in the Pleurothallis alliance of neotropics orchids, although I was never brave enough to try growing any of them. Of the thirty or so genera in the alliance, one genus had a spectacular name so appropriate for today: Dracula!
And if that’s not wild enough, Carl Luer in 1978 described what is perhaps the most outlandish of the species in the genus. And what do you suppose this mad scientist picked for the species name? Vampira! (A mad scientist with a sense of humor—I like that!) Besides having a terrific name, Dracula vampira is one awesome plant, something this photo attests to. Most of the pleurothallids are small little wonders, but the flowers on this one are eight inches top to bottom.
Scary, but intriguingly beautiful at the same time.
Number two: Scarier.
I know that I’ve shared this one bit of scariness with you before, but it continues to scare me every time I see it.
Ugly house
Every neighborhood probably has one of these, a house with a yard that looks like it’s auditioning for a part in a post-holocaust movie. Like, did the radiation from the bomb blast take out all the plants? To their credit, the homeowners do get points for creating a yard that takes no water whatsoever—a bonus in our current drought. But there are so many better ways to save water and enhance the world you live in. Greg suggested that someone seedbomb this house in a bit of guerrilla gardening, but how do you seedbomb concrete?
I’m not a big fan of the new generation of fake turf that’s going around these days. Although it’s light years beyond Astroturf, it still looks like plastic from less than fifteen feet away, and it does nothing to battle the urban heating phenomenon. At least it would begin to dress up this yard. And currently the Metropolitan Water District of Southern California is offering rebates of thirty cents per square foot of lawn that you replace with the plastic stuff. (At a cost of $12 a square foot for the fake turf, the rebate doesn’t go terribly far…)
The water agencies are also offering rebates on water-efficient sprinkler heads, starting at $4.00 per head, which would pay for most of the unit, as well as rebates on weather-based sprinkler timers. Check out the information on the rebate programs. One grouse I have with them is that there’s nothing that would give you a credit for replacing lawn with low-water-use plants that would also help keep the city cool by reducing the amount of reflected solar energy that is converted to urban overheating.
Number three: Scariest.
I was in the back yard looking for the cat the other evening, rounding her up for the evening indoors. She was being extra-coy that night, and I had to go for the flashlight. Returning to the garden, the flashlight beam highlighted this atrocity less than two feet from my face: the dreaded tomato tobacco hornworm! (Edit: Thanks to Jenny for correcting my identification of this little terror.)
Tomato Hornworm
Eek! I felt like Janet Leigh in the shower scene from Psycho, only I was better dressed at the moment.
This is a horror than any gardener can empathize with, I’m sure, particularly when the tomato tobacco hornworm is chomping on the last precious tomato plant of the season. As much as I try to be kind to nature, I marched inside to get the Felco shears and did battle with the beast.
(This photo is actually of another worm I discovered the next day. All summer long there were no hornworms. And then suddenly, bam!, there were several, chomping away on what may be the last tomato in the neighborhood.)
So…you decide. Was the tomato tobacco hornworm the scariest thing? Or was it the vile, murderous gardener who would commit unspeakable acts with a pair of shears?
October 31 2008 | Categories: gardening • landscape design • my garden | Tags: Dracula vampira • Halloween • orchids • tomato hornworm • tomatoes • water rebates • water use | 3 Comments »
Every year the water districts in San Diego county sponsor a contest to recognize gardens that use low amounts of water. The California-Friendly Landscape Contest has winners for each water district, and then overall winners in three major categories: best do-it-yourself, best professionally designed, and best native plantings.
Here are a few images of the prize winners this season. I think they show that you can have a lively yard without using swimming pools-full of water to keep things green. Some of the winners feature cactus and succulents, but you can see below that you don’t have to do the desert-thing to use less water.
Best California-native. Winner: Gidlund. Our native flora has plenty of choices that should be used more frequently. Flowering selections in this garden feature sages (salvias), asters (erigeron), and monkey flowers (mimus or diplacus, depending on which authority you side with).
Best in City of San Diego. Winner: Johnson. Succulents with contrasting leaf colors and forms star in this garden. This image features agaves, euphorbias and senecios among the assortment.
Best do-it-yourself. Winners: Mendell, Kirk (sorry, they only listed the last names…). This entry was another of the succulent-intensive ones, but this shows a portion of the garden with mounds of low plants with contrasting foliage, as well as plants in the distance in bloom. Most of us like flowers, don’t we?
Best professionally-designed. Winner: Whitney. A number of broad-leaved plants with beautifully contrasting foliage feature in this landscape. I think the contrasts are absolutely gorgeous!
Many of the photos show landscapes that aren’t 100% mature, but you can get a sense of what the gardens will look like in a few years. Also, as in many landscaping contests, the hardscape seems to get a lot of the attention. I’m of two minds on that issue. For a landscaper, a large portion of the profit resides in the hardscape details, with markup on a gazebo being way more than on a few shrubs. So some of the landscapes seem to push the human features rather than natural ones. But in the case of a well-placed garden path: what better way to imagine yourself in the new landscape than by “walking” through the space with your eyes, following a gentle meander through your beautiful new garden?
Check out all the winners. The deadline to enter next year’s competition is April 6, 2009, so that gives us all a few months to do a little replanting. In the end, any garden that helps save water can be declared a winner.
October 24 2008 | Categories: gardening • landscape design | Tags: drought-tolerant landscaping • hardscape • native plants • succulents • water use | No Comments »
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