I set out to write a diatribe on how evil weed barrier is, but Love is stronger than Hate, right, so let me write a little ode to lavender. Lavender is a fragrant sub shrub- I think it is actually what people think of when they say they want a shrub next to the patio- they want something a couple of feet high, with flowers, but mostly just green leaves. When plant people say shrub, they mean something that grows between 6 and 12 feet high- what the knights who say ni mean.
Anywho- I have a nice little lavender plant in a xeric bed in the back yard, but one of the other things about lavender is that is doesn’t have a very long life- my plant in the back yard is about 5 years old, and it won’t live much longer, no matter how well I treat it (sometimes it is not about killing exotic plants, different things just have different life spans) This little lavender bush will never grow taller than the house, like the oak, or form a sneak-out proof thicket in front of the window, like a rose bush (take that, sneaky teens!) It will just stay knee high, with fragrant leaves and purple flowers, much loved by bees.
Now, the reason I bring up weed barrier is that I was cleaning weeds out of the flower bed by the driveway. Previous owners had planted peonies and roses, in plastic weed barrier with lava rock on top. The bed is gorgeous in June- I probably wouldn’t have chosen those plants and that location and that quantity of lava rock, and certainly that black plastic weed barrier. I do love the garden, though.
The problem with the lava rock on top of plastic is that it doesn’t actually get rid of weeds, it just changes the way they present themselves.Over time, the lava breaks down into smaller chunks, and organic matter like leaves blows in. Weed seeds drift in and sprout. Bind weed finds a way to snake its roots up through any gap in the plastic, making it that much harder to pull out. In addition, the plastic cuts off oxygen to the soil beneath, preventing worms and other soil creatures from living there. It is awful. But, as terrible as weed barrier is, I love the little garden strip, and can’t face digging out the whole area to get rid of the plastic.
This all went through my head as I was cursing the weeds, so I figured out that I could dig it out the way the guy in the Johnny Cash song stole his Cadillac from the factory- one piece at a time.
I was working on an area with a small stump poking through the plastic- something had been planted there, and hadn’t survived. It created a 3 foot long space between peony plants, where opportunistic weeds jump in. So, I pulled the weeds, scooped the lava rocks to one side and cut and ripped out as much plastic as I could get to- there were fat worms living in the mix of crumbled lava and organic matter on top of the plastic, none at all in the dead clay beneath. That’s a problem. I added a scoop of composty soil from the back yard, dumped the lava rock back on and some wood chip mulch.
A few days later,after a trip to the nursery, I popped in a Provence lavender plant. I figure the lava will help aerate the soil, and help the clay soil drain better, which is important for Mediterranean plants like lavender. Three months later, with plenty of rain and sunshine, the baby lavender looks good, and more importantly, the few weeds encroaching on it are easy to pull from the loose soil. Next year, I’ll clean up another chunk, pull out some more plastic, and plant something else- something herby? Any ideas?