My urban homestead Producing food on a city lot

In the area of my property called the Perennial Paddock,  I have been doing a deep mulch for about six years, undisturbed except for topping it up with straw and pulling some of the worst perennial weeds.  When I can hire help to dig the waste alfalfa and manure out of the animal paddock, it goes on this mulch. The result, to my intense delight, is that where previously I had compacted clay and tumbleweed, now I have dark black soil about 12 inches deep.  This area has allowed me to observe that if you have time for the soil to build itself, and keep an endless supply of mulch to spread as needed, you do not really need to do any other soil amendment. You also don’t need to correct pH or any of the other maneuvers commonly recommended for soil improvement.  The year that I started mulching this area I invested in a bag of Thorvin kelp meal and spread that around, and since then all I have added is the straw and animal bedding. Lots of it. More than seems to make any sense when it’s dry and fluffy, but it will pack down to a surprisingly thin layer and have to be topped up a few times a season.

The first thing I ever planted here, way back before it was mulched, was a black locust tree. The little twig is now about 40 feet high, and when it is covered with blossoms in April, the entire tree swarms with bees.  It provides shade, and I think its  widespreading roots are part of what has broken up the soil so thoroughly.  In other areas of my yard I have actually had to break up hard packed areas with a pick, but in this paddock the locust tree has done all the hard work for me.

Now it is the matriarch of a wildly varied colony of perennials, and because of the soil quality and moisture level, this is also the place where I experiment with difficult plants. Oca, for example.  This member of the oxalis family is a sharp-tasting tuber available in a wild variety of colors.  It is native to the high Andes, and a sensible person would realize that it does not want to live in my flat baking high desert area with its  brutal summers.  But it is so pretty that I can never resist buying 15 or 20 tubers and experimenting.  So far I have tried them in a garden bed and in a berry row. In both locations, they grew until about July, then withered and died back, and the tubers that they produced were about the size of a pea or smaller rather than 1-2 inches long as they should be.

This year I ordered my usual optimistic packet of tubers, and decided to plant them almost directly in the shade of the black locust tree, in the deep cool soil that now exists there.

It will occur to the reasonable  economist that at this point I have spent a total of about $70 on tubers, and have not yet reaped any return.  But no garden is entirely reasonable.  If I were only going to grow things that “pencil out,“ I would do fine to just let my entire property come up in lambsquarters, which cost nothing to plant and give an effortless harvest of nutritious greens.  But I feel that I would be worse off for having missed the joyous expectation of putting beautiful little earth-jewels in the ground and hoping for them to multiply.  If I get enough to harvest, I don’t even know if I will like them, since I have never had a chance to taste them. But I’m not sure how much it matters. Hope is the point.

I get my oca tubers from Cultivariable, a fascinating source for little known Andean food plants.  They are usually sold out of the choicest selections by late February, so bookmark them for a look next winter.  I have read that oca foliage is also edible, so this might be a nose to tail perennial, but I don’t know yet.