A Perfect Blush

When a gardener comes to me and asks for a continual-blooming, hardy white or off-white rose, the first rose that comes to my mind is the Canadian rose 'Morden Blush'.  This white/blushed-pink rose has provided color in my landscape for over 10 years, and although it blooms in the shadow of a taller Zephirine Drouhin, it still manages to never be out of flower during what passes for spring, summer, and fall in the Flint Hills.

'Morden Blush' was introduced by Collicut in 1988 as one of the Parkland Series bred at the Morden Research Station in Manitoba.  According to one report, she has been voted as the favorite Canadian shrub rose by the Canadian Rose Society, but I cannot find a reliable source to confirm that award.  One Internet site describes 'Morden Blush' as "shy," and I believe that an apt adjective for her.  'Morden Blush' stays well-refined, perhaps 3 feet high and 2.5 feet wide in my garden, unlike her rampant Explorer series cousins.  Both her blush pink color and her soft scent add to her demure allure.

 Despite her non-vigorous nature however, she is completely hardy, with no die-back here in Zone 5b and she is reportedly hardy to Zone 3 with some tip-kill there. She is heat-tolerant as well, blooming and keeping good flower form throughout the worst of the Kansas summers and several writers suggested she is tolerant of MidWestern alkaline soil.  She blooms as vigorously as any rose I grow.  The very double blooms come 5 or so to a cluster, and open white with a pink center, fading to an ivory pink as they age. They repeat continually here Kansas and are listed at 12.3 weeks of annual bloom by Ogilvie and Arnold, the most prolific of the Morden group.  I view this rose as a "cutting rose" and she lasts well sitting in a vase on the kitchen table.

The only deficit I can ascribe to this rose is that her glossy deep green foliage is moderately prone to blackspot in my garden.  I don't know if it is because she grows in the shadow of taller Zephirine and Prairie Joy and surrounded by daylilies, or if it just her nature to be easily diseased, but I use this rose as a blackspot indicator for my garden and start spraying my few susceptible roses when I see "Morden Blush' begin to lose her hemline.  In fact, she is susceptible enough to blackspot that she'll sometimes can end up completely naked in my garden by Fall if I don't keep an eye on her, hardly a proper finish for such a coy beauty.    

A-Pear-antly Popular

As I drove to work this morning down from the highest point in Manhattan (a small hill called "Top of the World" overlooking the river valley the city sets in), I was suddenly struck by a vista of endless white trees sticking up over and around the roofs of all the houses.  Manhattan in Spring, it seems, is a monoculture sea of spring-flowering trees that makes it appear as if the very city itself was drowning in a tub of foamy soap bubbles.

I blame this sensory overload on the local landscapers, professional and amateur, who were planting 'Bradford' pear trees (Pyrus calleryana) ad infinitum twenty years back, and who, when Bradfords proved too weak for the Kansas winds, turned to the stronger 'Chanticleer' pear trees, or 'Snowdrift' and "Spring Snow' crabapples. You would think that in an area where Eastern Redbuds (Cercis canadensis) grow as a native understory tree there might be more use made of them in the landscape.  You would think that landscapers could choose randomly from a number of KSU-recommended crabapples, many of which happen to be something other than white (such as pink 'PrairieFire' or magenta 'Radiant').  There are pink-flowering ornamental peach trees, pink cherry trees, scarlet Hawthorns, dogwoods, and even a few purplish or yellow Magnolias that will survive here.  In contrast, I know of only a few tree-size Magnolias that survive in town, all of them white.

I don't have anything particularly against planting white-flowering trees.  My rebellious nature kicks in when white is the only choice and when the planted trees all bloom white and simultaneously.  Landscape architects are seemingly as bad in this regard as they are in using purple barberry and 'Stella de Oro' daylilies to excess.  Have they no imagination?

In my own yard, I could actually use a few more white-flowering trees.  I've got a 'Royalty' purple-pink crab, a pink 'Red Barron' crab, a 'PrairieFire' crab, a red peach, a Scarlet Hawthorne, and a bright yellow Magnolia (to be featured in a few days) that all are blooming now or will bloom soon.  My only currently-blooming white trees are an honest-to-god fruiting apricot tree and a Star Magnolia (Magnolia stellata).  Neither of the latter really matter as white trees because orchard trees don't count and the Magnolia stellata is still too short to see.  Maybe someday I'll fall into lockstep with the herd, but for now, I'm just going to keep being a pink blight on the white horizon.

Puschkinia Perfume

I bless the good  fortune, ten years now in the past, that allowed me to find and  try a few bulbs of Puschkinia scilloides var. libanotica, commonly known as Striped Squill.  I am always partial to the sky-blue Scilla sp. family and I am always on the lookout for species bulbs that will survive the wind and wayward Kansas Spring.  These minor bulbs (as Elizabeth Lawrence referred to them) are a match made in the heavens for my garden.

Puschkinia  are small bulbs of the hyacinth family that one website claims have been "gardened" since 1808, but I'm sure that must be the Western history of gardening with these Turkish natives.  Growing only 6 inches tall, a decent-sized clump at a distance looks primarily like a white ground-hugging blob, but up close, the beauty of these little guys is striking.  It took several years for this bulb to "grow" on me since I started with such a small clump,  but they have begun to spread on their own through the bed I planted them in, and they've now earned a permanent place in my garden.  VanBloem lists them as being hardy to USDA Zone 7-8, but they've survived and spread 10 years in my Zone 5 garden.  They also come in a completely white form, but these are harder to find and are probably undistinguished in terms of garden impact.  I've had enough lately of pure white mutant forms of otherwise spectacular flowers.

I didn't know until yesterday that they were also scented, but if you lay on the ground and bury your nose in the clump, they have a very sweet, but not overpowering scent.  I am personally put off by the strong odor of so-called Dutch Hyacinths (Hyacinthus orientalis) up close, and can't eat with a Dutch Hyacinth or Oriental Lily smelling up  the room,  but I appreciate the more delicate scents of these hyacinth-relations.  I suppose you could also cut these somewhat waxy flowers and raise them up to your nose rather than  flatten yourself down to their level to sample their aroma, but then, that would be cheating and would deprive you of experiencing another world, a little world, where these flowers are the gardening universe of their surroundings.

Poisonous Compost?

It is not often that I get to combine the job that earns my living (veterinary medicine) with my interest that consumes the excess cash (gardening), but I happened on a connection recently in a post on Gardenweb.com.  That post was from someone who had been told and who believed that their dog had been poisoned by eating compost.

I was a little chagrined to hear about this toxicity in a random post on the Internet, but I'll be the first to admit that my general veterinary education lies far in the past and, as a surgeon, I haven't followed advancements in veterinary toxicology for the past 25 years.  I felt a little better when I found my internist colleagues were also unaware of it.  A little quick research tells me that, indeed, there have been some reports of dogs eating compost and suffering toxic effects, even though some of those reports are undoubtedly of  "garbage gut," or diet-induced gastroenteritis, cases rather than actual toxic effects. Compost toxicity is, however, listed as such on the petpoisonhelpline.com website.

Knowledge is power, so I'll repeat here what I've found. Toxic effects from compost are variably suggested to be due to mycotoxins (toxins produced by fungal organisms), or to clostridial toxins (bacteria that may grow when meat or dairy products have been added to the compost).  Meat, eggs, and dairy products, of course, have no place in your compost pile anyway.  To me, that means that most of the compost I produce from leaves and grass, particularly if aerated properly, should be safe if one of the bonehead Labradors owned by my neighbor accidentally gets into it.

Symptoms of poisoning could include agitation, increased temperature, panting, drooling, and vomiting, and severe cases could progress to incoordination, tremors, and seizures. Since many dogs I encounter pant and drool incessantly, those aren't very helpful unless other symptoms are present. There is no specific antidote.  Inducing vomiting or gastric lavage in cases of known ingestion should help decrease toxicity.  Supportive care such as procedures to decrease body temperature, IV fluids, and anti-seizure medications may be necessary in severe cases.

For prevention, toxicologists suggest that in concert with eliminating the use of meat and dairy products in your compost, the pile should be fenced off from pets and wildlife.  My personal compost pile does sit within the electric fence that protects my vegetable garden, but I'm under no illusions that it will keep out my Brittany Spaniel, who has been known to chase rabbits through the fence more than once, let alone the neighbor's dogs who don't seem to have enough total neurons to spare any for pain perception.  And what do I (or we collectively) do about the compost that we heap annually around every old rose in our gardens?

I remain a little bit skeptical, knowing by education that the gastrointestinal system of dogs is designed for them to consume a vast array of foods that would cause a billy goat to puke, and knowing by experience that they seem to suffer little ill effects from eating delicacies that range from ancient dead rabbits to raw soil and on to cow poop. Compost toxicity in dogs probably has occurred rarely, but it also ranks with those normal unavoidable risks that occur in life, like drinking from a garden hose or touching undisinfected shopping carts, both of which seem to be freaking out the general population these days. I wouldn't rush my dog, however, to a veterinarian for a quick stomach pump just because I saw it digging in the compost pile for a vole. 

In a similar vein, it did concern me a little during my research to find that a gardener in England had died from aspergillosis (a respiratory fungal infection) started by exposure in his compost pile, but I'm also not about to start wearing a face mask (as suggested in the article) when I turn my compost.  What would the neighbors think?  Somewhere the fear has to be contained by reason.