Urban Micro Gardening

Lifelong Gardener – New Challenges

If you consider life after easily accessible oil and products such as artificial fertilizer derived from petroleum products, the thought occurs: "How will people cope?" Especially in an urban setting, you cannot be self sufficient. Still, can we become a bit less attached to modern food systems and even pass along urban gardening knowledge to those who follow? As a life long gardener I thought this would be easy. It isn't. That's what this post is about.

I have gardened all my life, starting in my teens with a quarter acre of land in northern NH, then on a third acre house lot in central Massachusetts. I like growing almost everything: herbs, flowers, vegetables, fruits (I’ve even tried mushrooms). Now I am living in northern Washington DC literally 6 miles from the White House. To quote Jefferson “Though an old man, I am yet a young gardener.” This garden has no more than 1/10th of an acre growing space surrounded by oak trees and on a downslope. My gardening efforts have grown beyond mere hobby with two new directions: An experiment to see how much can be produced on this little patch of earth, and a living lesson to my grandkids and others what is involved in approaching sustainable gardening. I’ve learn just how hard it is to garden in an urban setting even with significant sustainability investments.

Apart from the small space, there are other challenges: animals and barely adequate sunshine. Yes, animals: I built a 6’ fence to keep out the deer, rabbits and foxes, but I still lose produce to birds, squirrels, raccoons and who knows what all else. The neighbors love (and DC protects) its trees; I compromised and cut down enough to get me perhaps 6 hours daily sunshine.

Garden Strategy

My gardening strategy has several elements, each with a sustainability theme. First, pack quite a bit into a small space without overcrowding, and plant many small things in small numbers. Secondly, favor heirloom varieties since they require less fertilizer and you can harvest their seeds. Third, although aesthetics are important, think creatively and landscape with edibles. Strawberries and sweet potatoes are a pretty ground cover; blueberries are beautiful shrubs. Finally, diversity is important, since you never know what will succeed from year to year. I plant perennials, annuals, and dwarf trees.

I’ve emphasized sustainability with 3 rain barrels (185 gallons total capacity), an upward migration worm farm, tumbling composter, raised beds, and electric tiller. In fact, I've given away all my gasoline-powered tools in favor of electric and battery-based alternatives. (How well they work is also another post for another day.) We recycle essentially all table scraps, garden waste, and even some newsprint; our goal is to throw away no more than one garbage bag of waste each week, continuously looking for ways to reduce waste further.

That picture of a rain barrel? That's one of three that I own. Beautiful, functional, and if you're lucky lots of free unchlorinated water easily dripped into your garden. What could go wrong? Lots of things... but that's a post for another day.


What’s growing in this small space? I have a dozen asparagus plants, six rhubarb plants, strawberries, raspberries, blueberries, horseradish, two super-dwarf peach trees, a fig tree, a dwarf pear tree (picked since it doesn’t require another for cross-pollination). I grow herbs in pots and in the ground. We are experimenting with both culinary and medicinal uses for the 20 or so varieties.

I have tilled a circular area roughly 15’ in diameter for flowers, and another 100 square feet to see if I can grow sweet potatoes (these have become a groundcover extension of the flower garden). I have five plastic “Earthboxes,” essentially sealed containers of potting mix that require very little watering, fertilizing, and no weeding. Each can grow two tomato plants or 6 peppers, for example. These also are on wheels so I can move them to the brightest areas of the yard depending on the season. Lastly, I have two raised beds, each 8’ x 20’.

I run drip hoses from each rain barrel to different gardens. Worm compost and tea go into the gardens, as does the regular compost (supplemented with numerous pages from the Washington Post).

What have I achieved?

A more important question though, is “what are you harvesting from all these plantings?” Simple answer: Do you remember the book titled “The $64 Tomato”? I’d be happy if mine were that cheap. Perhaps it’s the difficulty of the Urban Garden paradigm, but this garden has been the most disappointing and difficult of any I’ve had through the decades. And I’ve spent in the 5 digits to set it up and make it work. If I were the quitting kind, I’d quit.

Some things like the peach, pear and fig trees may eventually bear fruit. Trees take time. But so far is not so good, primarily because of the extraordinarily low yields generally.


Lessons Learned

Urban gardening constraints are far less forgiving than growing in larger rural gardens. Oddly, the problem with animals is MORE severe in the city than in the country. For example, I suspect the deer in northern NH have learned that people eat venison, while they’ve also learned they have no natural predators in D.C.

Larger gardens provide more room for experimenting and more produce even when yields per plant are lower. This forces urban gardeners to react quickly to problems, measure everything, and document ongoing “lessons learned” to apply with each new season.

There are many advantages to growing heritage varieties. They provide a hedge against varying climate conditions (since they’ve learned to adapt). You can re-use the seeds. The produce is generally tastier (even if less pretty). They also require less fertilizer, perhaps growing with just compost and worm dirt. However, heritage varieties do yield a lot less than hybrids and often require longer growing seasons. It’s probably a good idea to grow both heritage and hybrid varieties. The little fertilizer needed for the hybrids is a better use of scarce resources than many other uses we can all name (think SUVs).

Be flexible, very flexible. If something doesn’t work out, and the reasons are beyond your control, then forget how much time, money and effort you put into it, and do something different. Find fast growing or shade-tolerant things to grow where there is the least sun. Decide which is more important for the best areas: mint or rhubarb, for example. I’m digging up the mint (it seems to grow nicely anywhere) and putting in more rhubarb where the original plants did very well.

Test your gardening area for moisture, sun, PH, and nutrients. Use an all-in-one tester (which unfortunately does not measure Nitrogen, Phosphorus, and Potash separately) or test individually.

And remember, there’s always next year.