Rooftop SIP Garden in LA

Got to visit John Zapf’s vertiginous LA compound yesterday. He’s got an amazing rooftop vegetable garden using self irrigating pots. John has little sun in the yard so the roof is only option for veggies.

He uses drip line to refill the reservoirs. Reminds me of the Green Roof Growers of Chicago (minus the extreme weather).

His two cents on what to grow: chard good, zucchini good, corn in pots not so good.

For more info on self irrigating pots on Root Simple click on the label for this post below.

Animal Tracking

A track trap we laid to capture chipmunk tracks. We got some mice, too. No one wanted our peanuts–the chipmunk actually hopped over them. These critters had an advanced palette, preferring locally sourced pine nuts from the pinon pines. Photo courtesy of one of my classmates, Kurt Thompson.

 Mrs. Homegrown here:

I just returned from an amazing five-day sojourn in the mountains, at the Windy Springs Preserve, in which I learned the basics of animal tracking from a pair of wonderful teachers, Jim Lowery and Mary Brooks of Earth Skills.

Tracking is the kind of skill that you can easily spend a lifetime, or two, developing. Yet it is also possible, with good teachers, for even a neophite like me to pick up a working knowledge of the art over a couple of days. By the end of the class, I was able spend an enthralling hour tracking a cottontail through a maze of sagebrush–all by myself.  Over the course of the class, I was fortunate enough to see the tracks of deer, bobcats, bears, coyotes, cottontails, jack rabbits, grey squirrels, chipmunks, kangaroo rats, foxes, mice, snakes, horned toads, lizards and beetles. We also got to practice tracking people, which is a lot of fun.

One thing I particularly appreciated about this class was that Jim and Mary encourage you to use your intuition as well as the “hard skills” of print identification, precise measurement, gait recognition, animal behavior, etc. For me, this was rewarding–and intriguing. It took tracking out of a purely left-brain zone, into a place of deep connection with both the animal and the landscape.

You can down load a free pdf on tracking basics from their website.

Tracking and Gardening

Now that I’m home, it strikes me that some of these skills I learned could be useful in the garden. Most anybody with a garden has had a moment when they wonder, “Just what kind of critter is digging holes in my beds?” or “Who is eating my cilantro down to nubs?” With my new knowledge set, I can answer these questions by setting up a track trap.

A track trap is an area of soil smoothed flat to capture animal tracks. In this class we used two methods: one was to drag a big, flat sack full of dirt (for weight) across stretches of open ground to smooth and compress the soil. When made in the evening, these clear spaces catch the prints of any animals that come through overnight or in the early morning. The results the next day were often spectacular–a clean, written record of the night’s activities. You may have seen this type of trap occur naturally on the bank of lake, or on a beach, or on a clean stretch of ground after a rain.

The other type of trap made by dusting a thin layer of dry clay on the rough side of a particleboard sheet, and then arching a piece of something flexible, like thin metal sheeting, over the board to protect the clay bed from wind, birds etc. If positioned correctly, these traps catch the tracks of smaller creatures–rodent types–very neatly.

If your garden topography allows it, you could drag clear the area around your beds in the evening and see what prints might show in the morning. The Internets are full of track pictures that you can use to identify your particular culprit. You probably already have a few guesses about who it is–it would only take a minute of googling to find out the difference between the tracks of, say, an opossum and a skunk. Or a feral cat and a raccoon. Even if the prints are not particularly clear, you can often tell a lot just by their size. Websites with track ID pictures come with notes about standard measurements.

Once you know for sure who is causing the mischief, it might be easier to come up with solutions for how to protect your garden. For instance, you could look up advice from your local Integrated Pest Management program, like the one offered by the University of California.

Note: If you’re in the market for a good tracking book, I can recommend the book we used in class, The Tracker’s Field Guide, written by one of the teachers.

Are Pallets Safe to Reuse?

Now you know. Pallet parts have names.

As a fan and proponent of reusing pallets in building projects, such as chicken coops and compost containers, I’m often asked if I think they are safe to use given that shippers and manufacturers fumigate them with pesticides.

In the United States quarantine regulations require that pallets be treated with methyl bromide, a pesticide being phased out due to its adverse effects on the ozone layer. According to Mary Howland Technical Service Manager at Great Lakes Chemical Corporation, a supplier of methyl bromide,

Methyl bromide products are restricted use pesticides. A certified applicator license is required to purchase and use these products and strict adherence to label directions/requirements is mandatory. Under normal fumigation conditions methyl bromide is a gas and when the pallets are properly aerated according to label instructions, virtually no methyl bromide residue remains on the pallets and wood materials.

Now I’m not a methyl bromide fan and I find it’s use as a soil fumigant in agricultural applications appalling.  But I’m not too worried about reusing pallets. That being said, a Tylenol recall was linked to the use of tribromophenol (TBP) to fumigate pallets. Though, depending on if you believe the trade organizations behind wood pallets or plastic pallets (they hate each other), the Tylenol recall may have had nothing to do with TBP which is not used to fumigate pallets in the US.

So, as with most issues on this blog, no easy answer. But I’m still not concerned about using pallets as a building material.