The Rose Garden: And It's Not About The Genus Rosa

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Lois Rose and Erik Draper after a Cleveland Indian win in 2016
Lois Rose and Erik Draper, September 27, 2016. Cleveland wins 4-2!

 

Last week one of OSU’s Master Gardener Volunteers and friend Lois Rose treated me to some images of her garden. Let us take a look at what was happening then in A Rose Garden in the Cleveland area.

 

Dwarf iris
"Katherine Hodgkin' dwarf iris in The Rose Garden in late March, 2020

 

Dwarf Iris (Iris reticulata ‘Katherine Hodgkin’).  At least that is what we think is the cultivar, after conferring with OSU Master Gardener Volunteer coordinator Pam Bennett. Wow. What my watercolorist mother Marcella would call Pastel colors. So delicate. As Pam said; “I have to get some.” Amy Stone of OSUE, Lucas County concurred with the ID, on our BYGL Inservice this morning, sending her pictures as well.

 

Dwarf iris
The pastel colors of this Ilex reticulata 'Katherine Hodgkin'

 

Chervil.  Lois grows chervil or French parsley, a cool-season herb, and I suspect she supplies this to L’Albatross, the French bistro in Cleveland where she has another garden that helps supply fresh herbs and vegetables to the kitchen. Chervil is one of the fragrant four (I made that name up) herbs used in fines herbes often added at the last stage of preparation in French cooking, along with tarragon, chives, and parsley. Subtle flavors (a bit like mild fennel) for omelettes, soups, salads, fish, and chicken. Chervil is a key in béarnaise sauce.

 

Chervil (Anthriscus cerefolium) is of Caucasus origin and is in the Apiaceae, the parsley or carrot family, which used to be called the Umbelliferae. Not surprisingly the seed-heads are umbels (defined as “a flower cluster in which stalks of nearly equal length springing from a common center and forming a flat or curved surface, characteristic of the parsley family.

 

Chervil
An early Spring start to chervil

 

 

Unidentified Evergreen.  Lois and I also failed to identify another of the plants in her garden, with its picture shown below; and again, help was on the way. I shared the picture with Jason Veil, Curator of the OSU Secrest Arboretum in Wooster, and his reply:

 

Needle juniper
Needle juniper, Juniperus rigida

 

This plant, which I have reason to believe resides at the southern edge of the mostly vacant Taxus plot at Secrest Arboretum is Juniperus rigida, temple juniper or needle juniper. Distinctive is it not?

 

Juniperus rigida
Juniperus rigida

 

Arborvitae Winter Desiccation.  First, something entirely different than desiccation.  We have many reports of arborvitae declining and dying in landscapes this winter, at least some of them in low areas. We have a hypothesis: that this may be due to very wet conditions last spring followed by an extended dry period later in the summer.

 

This 1-2 wet-dry punch reminds us of the demise of that Taxus plot Jason refers to at Secrest: We suspect that feeder roots of the Taxus in this 50+  year-old collection lost many feeder roots from poor root health in the near-record wet year of 2001 followed by near-record early-season drought of 2002 in which feeder roots did not regenerate, half the plot succumbed in the summer of 2002.. This was repeated in 2011-2012 when the half of the plot that survived the 2001-2002 onslaught then died.  

 

We shall see with arborvitaes. Obviously most are doing very well (if in good drainage) across Ohio, including the ones in The Rose Garden. Which brings us back to the original title: the desiccation. It is temporal, soon to reverse itself. Note the difference between the upper foliar surface and the lower, non-exposed, much greener foliar surface on the arborviatae. Simply ephemera of the cold season.   

 

Slight discoloration of arborvitae foliage
Slight discoloration of upper foliar surface of arborvitae

 

Arborvitae lower leaf surface
Bright green of lower, unexposed foliage of arborvitae

 

Rhododendron mucronulatum. Last week seemed a little early for this pale lavender Korean native rhododendron, but there it was nestled up against the warmth of the Rose House.  Rhododendrons and azaleas are all in the genus Rhododendron, but one (not perfect) rule of thumb is that azaleas have five pollen-bearing stamens, while rhododendrons have ten. The genus is in the Ericaceae, the heath family, and like other genera in the family prefers acid, organic, well-drained soils.  

 

Rhododendron mucronatum
Rhododendron mucronulatum near The Rose House

 

Siberian elm.  This elm (Ulmus pumila) is sometimes mis-named the Chinese or elm, but that is the lacebark elm (Ulmus parvifolia). Siberian elm is far less ornamental and often considered invasive. It is a grandfathered community forest tree in the Rose neighborhood, gradually being phased out over the years, but it does still have attractive rows of orb-shaped flower buds opening along the twigs this time of year.

 

Siberian elm twigs and buds
Siberian elm twigs and buds

 

 

Siberian elm buds
Siberian elm buds

 

Magnolia stellata. Star magnolia showed flower buds in the Rose Garden last week, and probably those buds have at least partially opened this week. Note that OSU student Claudia Winslett showed Loebner hybrid magnolias (with one parent being star magnolia) blooming in Columbus this past weekend.

 

Star magnolia bud at The Rose Garden last week
Magnolia stellate buds last week in the garden of Lois Rose

 

In northeast Ohio temperatures are struggling to reach 50 degrees this week and probably until Friday, so flowering is at a standstill for now, but with 9 out of the next 14 days predicted in the 60s and higher, degree days are going to be building up if the weather reports are accurate. The 70-degree days predicted for Wooster for April 7-8 alone should add 20 growing degree-days alone (70-50/2 X2=20).

 

 

Witchhazel. The native vernal witchhazel (Hamamelis vernalis) in The Rose Garden is showing off its marcescent leaves after its earlier (winter) season of bloom.  

 

Vernal witchhazel with marcescent leaves
Hamamelis vernalis after flowering in The Rose Garden

 

Corylopsis.  The butter-yellow blossoms of Corylopsis have made this member of the witch-hazel family one of my favorite late winter/early spring flowering shrubs. Last week this “winter hazel was in bud for Lois and today it is in a holding pattern with one open bloom at my house in Doylestown in northern Wayne County.

 

Corylopsis flower bud
Corylopsis bud opening last week in The Rose Garden

 

Corylopsis foliage
Corylopsis foliage last year in the ChatScape

 

Corylopsis foliage
Corylopsis foliage last year in the ChatScape. Such a cool plant

 

 

Corylopsis blooms
Corylopsis blooms years ago in the Oregon Garden

 

Hardy-Orange.  Lois expressed outrage (mock, I hope) at my description a few weeks ago of hardy orange’s “ominous” look. It is one of her favorites and she makes a mean bitter-orange (Poncirus) marmalade which she often brings to our ArborEatUm edible landscaping programs at Secrest in October. Differently delicious, but I still say that yonder Poncirus has a mean and jungly look.  

 

Hardy orange
Poncirus in The Rose Garden

 

Japanese Holly. Lois has a Japanese holly (Ilex crenata). How do you quickly tell the difference of this evergreen shrub from a boxwood (Buxus spp.)?  The leaves of boxwood (in addition to being malodorous) are opposite, instead of alternate for Japanese holly. Boxwood: BO.  Holly: HA.  

 

Japanese holly foliage
Japanese holly foliage. HA!

 

Oh, there is more there. River birches of great beauty, but as Lois’s husband Doug noted they drop sap onto cars onto the driveway. The Rose Garden sports a Japanese umbrella-pine, Sciadopitys verticillata doing well. There were spring croci in glorious bloom and saffron or Autumn croci with leaves just coming up, with flowers to arrive near the end of the growing season. And trust me, from my earlier visits there, hundreds upon hundreds of additional well-tended plants, set to hold court this spring, summer, and Autumn in: The Rose Garden.

 

River birch canopy
River birch canopy over the Rose Driveway

 

Sciadopitys
Japanese umbrella-pine
Crocus
Crocus vernus. Nearing its last reign this Spring

 

Autumn or saffron crocus foliage
Autumn or saffron crocus, Crocus sativus foliage up now

 

Lois Rose
Lois Rose, a true mensch, with tomato at her l'Albatross garden , back when restaurants were open