These days we are calling them deep nature gardens, but the project in Elizabeth’s back landscape has continued. There was a break during the summer, partly because this nature garden space is non-irrigated, so not much happens during the dry California summer, and partly because I needed some time to figure out some of the details of the deep nature gardening business.
Changes since our last update include the removal of the walkway made of redwood rounds. Elizabeth sometimes visits the chickens at night, and does not want to risk tripping on the wooden rounds in the dark. Sounds reasonable to me!
Instead, for now we will create a leafy pathway using some of the large fig and persimmon leaves that cover parts of the back yard in autumn. Later we might create a path using crushed shells or small gravel.
Some of the redwood rounds will be used to make pathways into the deeper recesses of the garden.
Above: During the summer we dug a little rain garden, marked out by the sticks in the photo. A test with a hose spray showed that sure enough, it works! Look at that sweet puddle. To the right of the rain garden is the path to the chicken run, now free of redwood rounds. At the left, under the edge of the fig tree, we have created a low mound using the soil removed from the rain garden. In the foreground is a plum sapling that we want to keep.
Above: Months have passed, and the rains have come. The rain garden and the low mound have both become covered in a mixed carpet of buttercup oxalis (Oxalis pes-caprae), cutleaf geranium (Geranium dissectum), common chickweed (Stellaria media), and many more kinds of sprouts.
Trees have lost most of their leaves, covering the ground with wonderful-nutrient rich food. In the background, between the rain garden and the persimmon tree, the path to the chicken run is now covered with leaves.
The lush, green carpet is certainly beautiful, but the highly invasive oxalis is overtopping almost everything else, and if nothing is done it will hamper many interesting kinds of plants that struggle to compete for nutrients and light. So it is now time to do some serious thinning.
The oxalis has deep bulbs, very hard to extract. For this first round of thinning I did not even try to dig down to the bulbs. I simply pulled up everything from the bulb up, by grasping each plant firmly just below the crown with two fingers. If this is done correctly, you end up holding the green plant and a long, tapering, white underground stem. The stem can be as long as a carrot, though it is much thinner. Like all the non-bulb parts of buttercup oxalis, it is edible. Sweet and tangy!
I worked in a patchwork pattern, focusing especially on the low bank, where some pretty rocks were added during a non-photo visit while it was still summer. I’ve also cleared out part of the basin of the rain garden, leaving behind a few patches for artistic balance.
Because the bulbs are still underground, many of these buttercup oxalis plants will grow back. The new growth will be flatter to the ground, smaller, and easier to pull out. There may be two or even three of these re-sprouts from each bulb, but eventually the bulbs will become exhausted and die.
What about the rest of the oxalis-dominated area? The plan is to continue working in patchwork patterns, clearing one area and then another, always leaving behind any interesting plants that managed to sprout between the oxalis. Discovered in the above clearing operation: miner’s lettuce, groundsel, scarlet pimpernel, and many small sprouts I did not recognize.
Am I worried that the sorrel and other fast-growing plants will get ahead of me? Nope, as long as I keep coming back I can move faster than they can. Look how much I was able to clear in just two hours or so, then consider that it took nature more than three months to grow that carpet of green.
The fig tree in the background above has been pruned so that it is possible to walk underneath — but please, let’s stay on the redwood rounds!
Above: A closer view of the rain garden and the bank, with a row of rocks holding it up. At the right, redwood rounds lead behind the bank. At the far right, the edge of the leaf-litter zone under the fig tree.
Last, this view of the far east corner, under the newly pruned fig tree. Big, floppy fig leaves cover the ground, partly smothering the oxalis and other plants trying to grow there. Lots more wait to fall. This is good, we want to create a nice deep layer back there. Any leaves that land on the rain garden or bank will be tossed into the east corner to make it even deeper.
Also in this zone are some irises that need pruning, some old, tangled roses that need shaping, and a very out-of-place palm sapling. That one might have to go. Eventually, it would be nice to add some native shade-loving shrubbery.
It was nice to get back to work in this happy little garden space. Stay tuned for more updates!