Perplexing Puzzler

ProfessorRoush is not sure what was unique about last winter, but there was a disturbing desertion from the garden this spring, a vexing vacancy of one of my most annually-anticipated arrivals.  Sadly, my 'Mohawk' viburnum did not bloom, nay, it did not even bother to leaf out.  Normally, this corner is one of my favorite early spots in the garden, but not this year.

All the other viburnums in my garden, 'Juddii' (see pictured on the lower left), 'Opulus', 'V. burkwoodii, V. carlesii, 'Roseum',  all these leafed out on schedule, fragrant and full.  But not 'Mohawk'.  Even now, after 'Juddii' has faded and dropped its blooms, settling in for a season of quiet growth, 'Mohawk' remains leafless, a mere twiggy skeleton, conspicuous in its absence.

Viburnum 'Juddii'

But I'm just scratching the surface of this mystery.  Literally, as I scratch the surface gray bark of 'Mohawk',  the inner bark is still green, all the way to its tips.  Will it yet undergo reincarnation?  Can I hope to see it leaf out and live on into next year?  What caused this lack of spring season rebirth?  Was it the extreme drought of last summer?  The subsequent wet fall and winter, drowning in the roots grown deep to keep it alive? Did a late freeze catch it just at its most vulnerable time, leaf and flower buds on the cusp of expansion, only to be frozen in time?

I'm actually leaning toward the latter theory based on the supporting evidence that almost all of my Rose Of Sharon (Hibiscus syriacus) are also either very slow to leaf this year or partially dead or both.  Several of those have yet to do anything, while a few are leafing out slowly and carefully, as if they were expecting cold weather yet.  These too, are still green beneath their outer bark.  To have a whole genus caught out and damaged by weather doesn't surprise me as much as a single cultivar of a genus, early bloomer though 'Mohawk' may be in relation to its relatives.

Any theories or advice out there among yee gardening Sherlock's of the internet?   Grub out 'Mohawk' and replace it (since I love it too much to do permanently without), facing the inevitable, or hope for self-rejuvenation and a gentle summer?

Sweet Smell of Spring

'Mohawk' Viburnum

Ask yourself, dear Reader, what is it that trumpets full-blown Spring for you?  Do you stir at the first sight of snow crocus?  Don your garden clogs at the glimpse of yellow forsythia and blooming redbuds?  Rejoice at the sight of cheerful daffodils and deep red tulips?  Instead of polls about politicians and social issues, ProfessorRoush would like to see CNN run a poll to determine the jumpoff point of Spring for the gardening public.  I might actually care about that result.

I suppose I react to all of the aforementioned signs, but the concept of Spring doesn't really rise up and excite me until the first fragrant viburnums bloom, as they are now beginning to bloom in my garden.  When I see those floral white snowballs open, when I suddenly run across a sweet current of air, that's when I really know Spring has arrived.  I know it is Spring when my nose tilts to the air and I begin chasing scent across the garden to its source, almost always leading me to a viburnum.

'Mohawk' bush form

'Mohawk' Viburnum has long been one of my favorite shrubs.  It exists in my garden in my "peony" bed, next to a wisteria and the path around the southeast corner.  'Mohawk' is a cross of V. x burkwoodii (itself a cross of V. utile and V. carlesii)  back to V. carlesii, and it has the distinction of being released into commerce by The United States Arboretum in 1966.  My current 'Mohawk' is about 6 feet tall and 4 feet wide, but I had a previous specimen that reached 8 feet in all directions.  When 'Mohawk' is blooming, I can never pass by it without a moment of deep inhalation and intoxication in silent reverence to the fragrance.  To imagine Heaven, one must only stand downwind from 'Mohawk', close our eyes, and inhale deeply.

I also grow the Judd Viburnum (V. juddii, a cross of V. carlesii and v. bitchiuense), first introduced around 1920 by William Judd of the Arnold Arboretum, the Burkwood Viburnum "species" plant often seen labeled as V. burkwoodii (but really a cross of V. utile and V. carlesii), and I grow the species V. carlesii (which is later and not yet in bloom here).  All are extremely fragrant, with burkwoodii a little larger and more aggressive in my garden than juddii.  The blooms are impossible for me to tell apart without knowing the bush of origin.

Viburnum burkwoodii

Of the three viburnums currently in bloom, I prefer the bouquet of 'Mohawk'.  It is less sickly sweet than Juddii or burkwoodii and it gently bathes my nasal passages in pleasure rather than assaults my schnoz with a wall of overpowering scent.  'Mohawk', to my uneducated nose, has more musky tones, which sound a note of deep calm in the fragrance, and it has a hint of vanilla that appeals to me, vanilla lover that I am.  Juddii is also great, but almost too sweet for me to stand there and inhale long lest I overdose and collapse, and burkwoodii has some licorice undertones that I'm not as thrilled about as I am about the vanilla of 'Mohawk'. 

In this week of yet another hard frost, another strong positive of these viburnums is readily apparent as well.  I have not, for a single moment, contemplated them needing any covering or protection because their tough blossoms need none.  The waxy petals shrug off frosts and simply resume blooming as soon as the air temperatures catch back up to the calendar.  Here, as one gardener suggested to me, on this 83rd day of February in the Kansas Flint Hills.