DryStoneGarden

For the past few weeks, Anita and I have been enjoying a wildflower planting in the new medians on Carlson Ave near our house. For years Carlson was an oddly humped road that had such a steep cross-slope near the sidewalk that the car door would hit the curb before it opened all the way and bicycling felt treacherous. To fix that, the city had to lower the street more than two feet to bring it down below the sidewalk, and in the process they also had to lower all of the utilities. The entire project took more than two years, involved all kinds of blocking of cross-streets and traffic, and was hugely inconvenient. But all is now forgiven, as far as I’m concerned, because the city added a median to the street and filled it with twelve blocks worth of wildflowers, many of them native. I’m happy to have my roads blocked if it means I get to drive and bicycle past wildflowers.

So far, I’ve seen California Poppies, Bachelor Buttons, Tidy Tips, Baby Blue Eyes, Alyssum, Lupine, and a few Snapdragons blooming, and there is a lot of Clarkia waiting for next month.

Hmmm…. Be careful what you praise on the internet. The same day that I put this post up, the city weedwacked all of the wildflowers. I’m guessing the planting grew too tall and was blocking visibility, but the city might also be ready to plant trees now. Farewell (to Spring), Clarkia, we never saw you bloom.

— Coda — Apparently an elderly driver got into an accident because of the reduced visibility caused by the wildflowers. Unfortunate for him, and for the wildflowers.

Dicentra formosa amidst Oxalis oregana

We don’t have a many deciduous plants in our garden, but for the last couple of years I’ve made a note of when each of them leafed out each spring. I didn’t really know how much variation there would be from year to year. So far, there hasn’t been much. Comparing last year, 2011, and the year before, 2010, I’d say everything has been remarkably consistent. And not just the wake up times for the plants, the garden itself has stayed consistent, with every plant on previous lists still growing in the garden except for the Indigofera which we took our during construction on our shed. A couple of Currant bushes are the only new deciduous plants of note.

Natives

Dicentra formosa has been leafed out for about 3 weeks, Dicentra ‘Bachanal’ is leafing out now
Ribes ‘White Icicle’ has one remaining bloom cluster
Calycanthus occidentalis is leafing out, leaves are out but not near full size
Ninebark leafed out at the start of February and has fit’s first flower bud opening, the same schedule as last year
Snowberry has been in leaf for about a month, it started leafing out soon after the ninebark
Mimulus cardinalis has been in leaf for a month, I moved its tub and replanted it and it has come roaring back, I also replanted the stream orchid, but it is just poking up through the soil
Clematis ligusticifolia is leafed out, about a week earlier than last year, the volunteer in a pot has been leafed out for over a month
native asters are leafed out
Phildelphus microphyllus is leafing out
Acer cirnatum, young and in a container is dormant
Amelanchier alnifolia in containers is still dormant
Allium unifolium has buds
native lilies are a foot tall and have been up for several weeks
not a deciduous plant, but I ate the first woodland strawberry this weekend

Non-Natives

the fig is leafed out and has a bigger spring crop this year, about 10 figs
the Chaste tree has leaf buds opening
Acer palmatum from seed has been fully leafed out for several weeks, Acer palmatum ‘Japanese Sunrise’ is mostly leafed out
the neighbor’s Chinese Pistaches are budding, our more sheltered one is not
the Walnut Tree is budding
One of the young Eastern Redbuds has some flowers, the other 2 are dormant, mature ones in the neighborhood are blooming
the Fruiting Mulberry, in a container, has leaf buds opening
Astilbes are still dormant, leaves beginning to appear on the 3rd of April
both Black Currant bushes (transplanted in December) are budding

Our Fig Tree

For the plants that are still dormant, I’ll probably come back and add final leaf-out dates.

Last weekend I went to see the Drew School vertical garden by Patrick Blanc, the French botanist who started the current green wall craze. He designed a wall in San Francisco that was installed this past February . I was a little skeptical of the whole green wall thing, but then looking up at his wall — four stories high of California natives with over 100 species — my doubts evaporated. The whole thing absolutely overflows with enthusiasm for plants. Two big walls covered in natives, what’s not to love.

A pair of gardeners were doing maintenance while I was there. At first I was a little bummed to see this big orange cherry picker in front of the wall, but then I realized that it was a great opportunity to find out about the wall. I mean, I see this thing and I wonder how much does it cost, how will it age, how much maintenance does it need, and who will give me one for Christmas? Watching them work, I was impressed at how easy the maintenance actually seemed. Like any other gardeners, they cut the plants back with Felcos; they just let the green waste fall to the sidewalk and they barely even had to bend over to work. Progress was steady. It looked quite pleasant.

The plants are essentially growing hydroponically. The black flannel acts as the planting medium for the roots, and water mixed with nutrients drips down the wall, collects at the bottom and then recirculates. This is the first time anyone has ever tried something like this with California natives (he usually uses tropical plants), so the project was considered something of an experiment. Some species like Oxalis oregana or Mimulus cardinalis seem like reasonable candidates for a hydroponic wall, but some of the others like Artemisia tridentata and the Fremontodendron were a shock to me. It’s hard to tell from the photos, but up at the top there’s a Ribes sanguineum, a couple of bushy Mallows, and at least one Ceanothus.

The gardeners said they had done some replanting in September, but this was the first full maintenance pruning. They were cutting things back to do a one-year assessment of the planting and see how everything was growing. After a year of growth, some plants were starting to cover others. The Beach Strawberry was running all over the place, the Dudleyas were getting covered by other plants the same as they did in the Academy of Sciences green roof, the Lupines were short-lived, Penstemon heterophyllus looked like it was also going to be short-lived, but overall the plants were doing really well. The shrubs up top were growing exuberantly, maybe a little too exuberantly; the shade groundcovers down towards the bottom had the best year-round appearance. I found that in the places where the fabric showed between the plants, it didn’t bother me or diminish the effect.

Pretty healthy for a bunch of plants on the side of a building.

I definitely want to make it back in the spring when a lot of the plants have grown back in and are blooming. It really does have tremendous impact when you see it on the street.

Here’s another view of the woodland strawberry planting I showed on bloom day. The strawberries have been rather mealy this year. Two years ago they were good, last year they were okay, but this year they aren’t much good at all. I’m guessing that might be because of all these April and May rains. Also, the leaves are looking somewhat chlorotic up close, so they might need to be thinned out to refresh them. We originally put these in as a cheap, low-water groundcover, but after a big harvest of berries the second year we started to think of them as an edible deserving of more attention and respect. If anyone has a suggestion for getting fruit production back up, please let me know.

This planting started with three 2″ stubbies and had full coverage within two years. Normally, I’d be afraid of a groundcover that can spread this fast, but it’s pretty easy to control because it does all its running above ground. California Native Plants for the Garden uses a photo of it to illustrate the potential ‘weediness’ of some natives, but personally I like the look of the strawberry with the irises and alliums rising out of it. Any drought-tolerant, evergreen, native groundcover that produces berries is okay with me.

Allium, Fragaria, and Iris

Sidalcea bloom, Sisyrinchium and Fragaria foliage, in February

The sidalceas disappeared into the strawberry patch a couple of years ago, with only their flowers showing unless you hunt for the leaves. I like its ‘What plant are those flowers coming from?’ effect.

Blue Eyed Grass, Sisyrinchium bellum, last month

Mostly Fragaria vesca

We put in a single Beach Strawberry, too, which is now the dominant plant in its own corner of the planting. It has sent out runners through the rest of the planting that send leaves up for a bit of textual contrast. Before growing the two strawberries, I used to get them confused, but side by side it’s not hard to tell the difference. The beach strawberry has a harder, darker, thicker, glossier leaf. Flowers are bigger and often set deeper within the foliage. I’ve never seen a berry on it. Woodland strawberry unsurprisingly prefers part shade, while beach strawberry is happiest, again unsurprisingly, in coastal full sun, but both plants have worked in pretty much every situation we’ve tried them.

Fragaria chiloensis and Fragaria vesca

Fragaria chiloensis, on the left, Fragaria vesca, on the right

Quercus garryana or lobata

This is one of the best oak trees I’ve seen, in a Lafayette yard where we did some work a couple of years ago. I was back to check on the pondless waterfall this past week (still no leaks or pump problems, knock on wood), and I was glad to see the oak is just as amazing as I remember. At the time I thought it was a Garry Oak, but apparently the various arborists and oak experts who have looked at it have given several different ID’s, saying it could be a Garry Oak, a Valley Oak, or a hybrid between the two. They also differ on their estimates of its age. Everyone agrees, though, that it’s big and old and beautiful.

Wow

To my complete astonishment, the highlight of my day yesterday was the Lowes parking lot in Concord. It has the biggest, bloomingest, most successful wildflower meadow I’ve ever seen. I have some cynical thoughts about it — it was probably done to appease environmentalists or the planning commission, it was probably amended with all the damaged bags of Miracle Grow, Monsanto probably supplied the seed mix — but it was impressive nevertheless. Not something I expected to see at a big box store.

Tidy Tips, Layia platyglossa

Tidy Tips predominated in the bio-swale, Chinese Houses on the berms.

I had never been to Lowes before and it turned out to be even more like Home Depot than I expected, but my hat’s off to whoever is responsible for that meadow. It’s pretty incredible.

Tidy Tips, Baby Blue Eyes, Alyssum, and African Daisy