I am experimenting with a neglect-tolerant garden in a somewhat unforgiving climate.
We are gone for periods from 2 weeks to 2 months.
We live in the arid North American west, at an elevation of about 3200 feet (1000 meters?) above sea level.
We have rain averaging maybe 12" to 15" per year, possibly more due to cloud-forest effects at our elevation.
The pattern is about 1" (2.5 cm) per month 8 months of the year, with up to 2" (5 cm) in May and June, the best growing season. Up to 3 high summer months (July, August, into September) are often completely dry. If there is rain it will be a thunderstorm often accompanied by lightning-struck fires. We get pretty smoky some summers from all the wild fires.
The soil is rocky, glacial and volcanic silt. Areas of upland bog are showing some signs of salt accumulation.
We have a
pond, in which I am attempting to remediate some past bulldozer and black-plastic work. I am spreading existing cat-tails and bulrushes, silver cinqueoil, and hardy reeds as I clear plastic from the exposed banks. The
pond does not hold as much
water as formerly. The entire mountain is being settled more and more; we may have a groundwater shortage, or more draw from the aquifers than is replaced by snow and rain. Or it could be due to earth-moving efforts; there have been some dams on the creek upstream, illegal drainage work, etc. We may just not be receiving the spring thaw floods as we used to do.
So as a responsible
permie, I would prefer a no-irrigation garden.
I am working with
hugel beds (buried logs), both above and below ground level. I had arugula re-seed in one of the beds after total neglect from mid-August through mid-October, a real success for me.
I am also interested in working along the boggy areas around the pond, and some existing lawn-like swales grazed by an elderly horse, to create food and wildlife habitat without much additional
fence work.
Experimenting with re-establishing aspen
trees, using capsicum and slash piles to deter browsers.
I would like more
perennial food plants for our fenced garden areas, a mixed orchard with some pine shade, a south-facing exposed area with hugels. And I'd like to expand into unfenced areas if there's a way to do this.
My first choice would be
native American bulbs and perennials that can produce a fallback food supply with no attention at all. Berry bushes would rock, but locals have not seen blueberries naturalize here. Huckleberries? We do have wild currants or gooseberries, and elderberries and apricots do well at elevations not much lower than ours.
I'm also interested in
fuel forestry, insulation materials, and basketry plants; the reeds and cat-tails are great there.
Do you know anything useful, and cooperative about future succession, that can
out-compete thistles in disturbed ground?
(yes, please give me 3 magic beanstalks, and a flying carpet, too. thank you.)
My next choice would be food plants that can survive the winter here (sometimes -10 to -30 in exposed places, we don't always get
enough snow to insulate the ground before it freezes hard.)
We have had some good success with horseradish, rhubarb, some onion species, wild and some cultivated strawberries, violets, a small dwarf orchard with
apple, cherry, and trying to establish Asian pears; the plum rootstock thrived but the graft didn't.
As for greens, we plant some frost-hardy stuff like peas and broad beans, and are looking at hardy stuff like the horseradish. Some kind of sorrel has volunteered, either re-seeding or perennial.
We would like to find more tubers or bulbs, more perennial vegetables.
The plants we need are both
frost-hardy and drought-hardy.
We can get snow in any month, though it's rare past April and before late September. Intermittent radiant frosts are common. The in-laws raised radishes, salad greens, potatoes, bush beans, and strawberries enough to run a farmer's market stall for a few years, using hand-watering irrigation for these annuals and choosing varieties with very short seasons (55 days to maturity) because our average frost-free season is only 70 days.
Summer drought is predictable and extended - we just call 2 or 3 months with no rain "summer," aka "Fire season."
Almost all the native plants are frost-hardy and put on their main growth spurt during the spring thaw, with a minor growth option in the fall if weather permits. Many are summer dormant due to the low moisture. Humidity levels are routinely below 25% in summer daytime, increasing above that level only at night. Daytime humidity may remain below 10% for weeks at a time. Evaporation exceeds rainfall by several times 100% in these months.
Summer is not excessively hot - 90 to 105 highs occasionally - but more typically 80's high with 60's low through the summer, sometimes 50's lows even after a hot summer day.
It's just completely without rainfall, and the soil is well-drained expansive silt - "moondust" that can block incoming water and drain the rest pretty quickly.
We do have connections in the valley for your more standard annuals, where the frost is not as extreme, and irrigation water more easily available due to the river and being downslope of some mountain reservoirs. There are a few grass crops that are grown without irrigation in our climate, but the majority of production is irrigated orchards, irrigated
hay and grain, and small fruit-and-vegetable farms.
So we don't need to grow the usual annuals up here - we're looking for creative options.
Any favorite plant suggestions much appreciated!
We have had some good suggestions in threads in the regional forums, as well. I liked these threads:
-
Montane Indicator Plants
-
High Dry Plant List (book review, article link: Article with plant examples from book)
-
Okanogan Highlands - good groundcovers, mulch plants?
Thanks,
Erica W