Author Archives: gardenriots

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About gardenriots

I'm a horticulturist with 35 years experience primarily in the maintenance and management of public landscapes and gardens, including, renovation, construction, planting design, doing horticultural reviews of capital projects and creating and implementing maintenance plans that recognize the dynamic nature of these places. I have a strong interest in sustainable/ xeric landscapes and view the landscape as an opportunity to create places of beauty in an all too often utilitarian urban world while at the same time using them as a teaching tool for the public and peers. I recently retired from Portland Parks and Recreation where I was responsible for many of our downtown landscapes for 16 years. I have a degree in ornamental horticulture and a life long interest in science, beginning when I was ten or eleven with astronomy. I became fascinated by physics and the paradoxes and conundrums theory left us with in the '60's. I moved on from this to an avid interest in nature, biology and the living world around me in Central Oregon. I did not find a mentor so instead spent many hours by myself exploring and wondering and became largely self-taught, a pattern that has continued through my adulthood. Some of my postings are a direct result of my curiosity and are a result of my learning style, submersing myself in a topic that interests me, generally related to a plant I have grown and then building a fuller understanding of what is going on. Topics as diverse as general evolution to quantum biology and learning the biogeography of regions from which my plants come are continuously fascinating to me. These interests can become consuming 'rabbit holes' for me taking me places my wife does not understand. The world to me is a beautiful, fascinating place filled with puzzles to be understood and thereby more fully appreciated.

Tool’s of the Trade: Shovels, Implements of Construction…and Maintenance

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(I wrote this piece a few years ago. It was last printed in the Fall 2012 HPSO Bulletin.  It is updated here for my Blog.)

Cut from a piece of sheet metal the failure point is at the bottom of the 'arrow'

Cut from a piece of sheet metal the failure point is at the bottom of the ‘arrow’. Yes, I know this is a square point, but the are built using the same process.

I broke my shovel at home last week digging out a smaller-growing bamboo, Semiarundinaria yashadake ‘Kimmei’. It was at least ten years old, the shovel that is, and I broke it the way most people do, prying with it. I’m not nearly as hard on shovels as I used to be; I know their limits, but I was tired of this shovel. It was one of those thin-gauge “stamped” shovels that hardware stores sell these days to consumers, inexpensive and cheaply made; the kind of tool a person could buy many times over the course of their gardening life. I have broken several in the past jumping on them, with two booted feet, while trying to cut through heavy soil and roots, or like I did here, levering to hard before the object of my attention was adequately cut free of its earthly ties. Stamped shovels flex due to their thinness. Any flexion causes an inefficient transfer of energy when attempting to drive the blade against resistance. Think wasted energy and more effort. Stamped shovels have a soft fold where the smooth curve of its bowl bends into the vee that becomes the sleeve that then wraps around the shovel handle. This shaping of the blade adds some rigidity that the same material flat doesn’t possess. Any such bend in a piece of metal, however, becomes the weak point. This is where the metal breaks. Finding a quality replacement requires special ordering or buying through someone who serves the nursery or landscape trades.

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My Fall Garden After an 1.5″ of Rain

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Those big paddle leaves are Heleconia schiediana. The purple is Strobilanthes dyerianus next to a strappy Crinum powellii 'Alba' backed up with Canna 'Bengal Tiger'

Those big paddle leaves are Heleconia schiediana. The purple is Strobilanthes dyerianus next to a strappy Crinum powellii ‘Alba’ backed up with Canna ‘Bengal Tiger’

Cordyline 'Pink Sensation' in front of Canna 'Bengal Tiger', Xanthosoma 'Lime Zinger' and the fat pseudostem of my Ensete, Gloxiana floating in the shadow

Cordyline ‘Pink Sensation’ in front of Canna ‘Bengal Tiger’, Xanthosoma ‘Lime Zinger’ and the fat pseudostem of my Ensete, Gloxiana floating in the shadow

Mahonia x media 'Arthur Menziesii' flower buds beginning to swell for winter's bloom

Mahonia x media ‘Arthur Menzies’ flower buds beginning to swell for winter’s bloom

Brugmansia 'Miner's Claim' with the bloom of Canna 'Wisley Dwarf' poking through

Brugmansia ‘Miner’s Claim’ with the bloom of Canna ‘Wisley Dwarf’ poking through

Gardening as a Political Act: Growing a Better Public Landscape – The Ross Island Bridge West Approach

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Peeling off towards downtown from the bridge westbound

Peeling off towards downtown from the bridge westbound.  The little landscape Roses and new trees…one mown down by a car further down.

I’ve said it before that everything we choose to do is a political act. Politics is not something practiced by ‘politicians’ exclusively. We are social animals. What we choose to do effects those around us…gardening is political. We have chosen to invest our time and energies into growing plants and maintaining our gardens. We do this as individuals. They feed our spirits and those of our friends and families. Beyond this are our neighbors and, to some degree, commuters passing by. I’ve had people I don’t know stop by and tell me, “I’ve been walking/riding/driving by your house for years and I just wanted to tell you how much I’ve enjoyed it.” There’s the bus driver who used to stop in his turn at our corner, open the doors and tell me how much he loved my Wisteria (now gone…Sad for him, good for me), the guy from BES who stopped one day to quiz me about a Grevillea and many others. People, gardeners or not, may be buoyed by your gardens. We change the world for the better. Politics need not be limited to the big divisive social, economic and environmental issues of the day. In fact, if we want to make a positive difference we better start on the little things that we can.

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Choosing a Tree: Issues of Structure and Growth

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Right Plant Right Place covers a lot. Usually when you hear it used the speaker is referring to matching the plant with the growing conditions: soil, sun, climatic conditions, size, etc. Here, I’m going to address the physical structure and growth of a tree as it relates to place, Carpinus betulus ‘Fastigiata’, in this case, as it is often used as a ‘street tree’. The Upright European Hornbeam has proven its value as a street tree. It is very adaptable to conditions in our region that exist at the curb. That being said there are questions of structure and growth that need to be asked if such a planting is going to be aesthetically successful over the longer term.

Hornbeams across the street from my house after pruning

Hornbeams across the street from my house after pruning

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Desirable Plants, Thugs and Weeds: The Fine Line Between Good and Bad

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Our native Bleeding Heart, Dicentra formosa with Siberian Squill, Scilla siberica…both of these are ‘weedy’ in my garden, the Dicentra spreading quickly from its brittle rhizome while the Squill, an extremely ‘successful’ old fashioned garden plant, persists and increases even in long neglected gardens and homesteads. While neither of these are technically ‘weeds’ they both possess degrees of vigor and adaptability that have allowed them to persist, often in spite of our efforts to limit or eliminate them.

The first in the critically acclaimed ‘Over-Thinking Series’

What is a weed? What differentiates it from any other plant? What about plants like Golden Creeping Jenny? I know those who call it a weed. Is it a matter of generally accepted horticultural opinion? One is on the list and the other isn’t? Is it more than simply a plant we did not plant? We all have those fortuitous seedling volunteers that appear bringing with them a little garden magic. Some of these prove themselves to be quite remarkable and, if found by the right person, if they retain their desirable characteristics when propagated and are stable over time, may become the next rage among the garden fashionistas. They aren’t weeds are they? While not planned for we may choose to welcome certain such plants. To just define weeds as plants out of place, is to render the word almost useless as an aid to understanding our problem.

There is no conspiracy going on in the garden. No malignant intelligence plots and schemes to upset our plans. Not every seed germinates. Not every bit of rhizome or tuber will take over the garden/world without our intervention. Weeds are plants and within the limits of their own genetics they either grow or die. If a seed of Calypso bulbosa finds itself on the ground in the desert. It will not germinate. Eventually it will lose its viability. No one will notice its absence because it never belonged there. All plants possess a degree of vigor. All plants have within themselves a range of conditions they can grow and prosper in. Weeds, are plants that possess the vigor and adaptability to be successful under the range of conditions that we as humans typically occupy. Because we occupy these places, disturb them, because we move about and conduct trade with those elsewhere, we have ‘weeds’. These are merely the plants that do well in the places that we habitually have created. What we should be talking about instead is the quality of ‘weediness’, that blend of adaptability and vigor, that these plants possess.

(Readers should be aware that there are no pretty pictures to either break up the following text or to graphically ‘hammer the lesson home’. Continue reading →

Butia x Jubaea: A Pinnate Palm for Portland – First Test…for me

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Butia capitata at my front stairs along with a new Beschorneria yuccoides 'Flamingo Glow' and a Agave parryi 'Hauchucense'

Butia capitata at my front stairs with a new Beschorneria yuccoides ‘Flamingo Glow’ (I had just removed a Beschornieria septentrionalis, divided and potted the starts up. The replacement has more flamboyant foliage.) Iris douglasiana ‘Canyon Snow’, various low Sedum, Asarina procumbens, x Halmiocistus ‘Merrist Wood Cream’ and an Agave parryi ‘Hauchuca Blue’

My friend Steve has urged me to periodically write about my experiences in the Denial  Zone…so here’s a little something:  We all know you can only go so far with the whole tropical thing in Portland if you’re not going to invest in a greenhouse.  Those of us who try to mimic the tropical look realize that we have to seek out the temperate and a few sub-tropicals that give us that ‘feel’.  Bold foliages are key.  Architectural plants, and just as important strong foliage contrast.  This is not the place for subtlety.  Strappy, fuzzy, split and dissected, compound pinnate and palmate, glossy, drip tipped, bold variegation and wild patterns…over the years observant nurseryman and plant hunters have brought us a smorgasbord of unusually foliaged plants.  Plant breeders have pushed the limits crossing hardy species in ways that mimic their tropical cousins, I’m thinking Hibiscus here.  But still there are certain plants, certain forms and silhouettes, that are hard to replace.

Palms are one of these.  Many of us grow various palmate forms like genus Trachycarpus, T. fortunei, most commonly, while others have used T. wagnerianus, T. takil and T. princeps.  There are many others but of unproven hardiness.  Another form of Palm are those with costapalmate fronds, of these I have a Sabal minor doing fine at home slowly getting bigger in the ground for the last four years, (It’s more than ten years old.  I’m of the age now where I just say something is ten years old because it’s easier than checking.  It may actually be 12-15.) and a Sabal x ‘Birmingham’ I have high hopes for probably destined for a few more years in the pot before I try it out in the ground.  (The genus Sabal includes the Palmetto Palm native to the coastal southeastern US. They tend to be slower growing than Trachys, preferring more heat, often with larger more deeply segmented fronds. For those of you who don’t know, costapalmate are intermediate between palmate and pinnate.  The stem extends into the frond where the segments separate and fan out.  This extension may be slight as it is in Sabal minor. Instead of having the segments radiating evenly from one point at the base, the ‘base’ is slightly elongated stretching it as if it were briefly considering being pinnate.  A casual look might leave the observer thinking that something is slightly off with what appears to be a palmate leaf.) Perhaps others will be found growing in the extremes of their home ranges that can take zn7 and 8 consistently with smiles.  I planted the aforementioned Trachys over the last several years in and near Waterfront Park’s bowl.  (Actually, the T. princeps is new this spring.  Cross your fingers.) They are consistent and durable performers…even through last winter.

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Tools of the Trade: Pruning Shears, Loppers and Saws

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(This is a slightly edited version of the same article published a few years ago in the HPSO Bulletin.)

The Pruning Series, 1

If you garden you will need to prune. Pruning is necessary not only for garden aesthetics but for the health and survival of plants in your garden. Gardens are our own inventions. They are infused with our intentions while the natural forces at play in any landscape work toward their own conclusion. We gather plants from disparate places around the world, put them together on soils in climates they did not evolve with, in intimate relationships we impose. We will have to be involved in an ‘editing’ process that is ongoing within the ebb and flow of plant growth and death that will include shuffling, removals, additions and pruning. Gardens are dynamic. Whether we make ‘good’ plant choices or not our continued involvement is a given. If we are good observers and modify our actions accordingly, we can move our gardens toward a balance that will require less of us. If we have aesthetic priorities that we are unwilling to relinquish, we will have to work to assure they continue. If our knowledge of how the plant will perform on our site is less than perfect and we fail to take all of it into consideration when we planted, we will have to intervene, maybe regularly.

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Arctostaphylos patula: Greenleaf Manzanita – Seeing a Plant in Context

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Arctostaphylos patula growing on site near Whychus Creek south of Sisters, OR. Here it is 5' tall growing in a mixed condifer forest along with Doug Fir, Grand Fir, Noble Fir, Ponderosa Pine and Western Juniper.

Arctostaphylos patula growing on site near Whychus Creek south of Sisters, OR. Here it is 5′ tall growing in a mixed condifer forest along with Doug Fir, Grand Fir, Noble Fir, Ponderosa Pine and Western Juniper.

Outside our breakfast window, when I was a kid, was an Arctostaphylos patula. I never thought that much of it at the time, and how unusual it was, that sometime, probably by the late ‘40’s or early ‘50’s, somebody had dug one up and transplanted it to our yard in Redmond. They are denizens of the eastside Ponderosa Pine forest ecotone not the Sagebrush ecotone where I grew up. We averaged less then 10” of precipitation a year, too dry (For those who don’t know Redmond, OR, lies wholly within Oregon’s High Desert country that puts it in USDA zone 6b, -5 to 0 F). It grew in this little jog of the house facing northwest. I’m sure it got overspray from when we dragged hoses and sprinklers around to keep the lawn green, which is probably why it had grown with some vigor, having a form that you wouldn’t see in the Ponderosa – Juniper transition band sixteen to twenty miles away. In my memory it was always clean, with bright green foliage, part of which can be attributed to the low desert humidity and our sandy soil. I wish it was still there to take a picture, but the house has sold several times and had ‘improvements’ to the structure and the landscape including an irrigation system. I don’t know whether it rotted out or they removed it for one of their remodel projects. In its day it was 6’ high x 7’-8’ across with the characteristic sinewy branches and smooth peeling red bark.

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Whychus Canyon Preserve

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IMG_0062Whychus Creek starts up in the Three Creeks area south of Sisters, OR, below Broken Top and the Three Sisters, and runs north-easterly to where it joins the Deschutes River winding much of the way through a canyon carved through basalt.  It’s a beautiful band of green cutting its way through the Juniper – Sagebrush Scrub country where I grew up.  I’d never been to the Preserve before and was happy to see it mostly intact.  Though development has been creeping up along some of its edges the Preserve is being actively managed by the Deschutes Land Trust these days.  We hiked it on June 26 and many plants  were still in bloom.  Many people from the wet side of the Cascades have never developed an appreciation for the starkness of Oregon’s High Desert country.  Julie and I both grew up over here and where some people see barreness we see country defined by its sky, its geology and the spaces in between that set off the unique character of everything that lives here.  We took this hike with long time friends, Robert and Elayne, who stayed in Bend when we and others left.

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