Winter Wrap-Up: Certainly NOT Boring…

March 29th, 2013 by UWBG Horticulturist

According to Cliff Mass, UW meteorologist, our past winter of 2012-2013 was the most “boring” on record. There were no major weather events such as wind storms, artic blasts, snowfalls in the lowlands or major flooding. This was indeed good news for the UWBG horticulture staff. Instead of spending the winter cleaning up after storms and worrying about how many plants would be affected from cold hardiness issues, we were able to focus on scheduled and planned work projects for a seasonal change of pace.  Here’s a rundown of several of these projects we were able to accomplish during this most boring winter.

Reclaimed View of Azalea Way from Lookout

Reclaimed View of Azalea Way from Lookout

An adjunct to the current Pacific Connections Garden – New Zealand construction work was taking on the long overdue renovation of the Lookout rockery and reclaiming the lost vistas from the Lookout viewpoints. Arguably the most interesting rock work in the arboretum, the rockery was essentially lost under overgrown plant collections. The crew certainly wasn’t bored with the thought of what new and exciting discoveries lay under the next pruning cut. When the Lookout gazebo reopens to the public, visitors will be able to see the pond and Azalea Way from inside the newly restored structure and experience the original 1941 design intent. In other words, the Lookout is once again a lookout. Also, check out the new  Rhododendron species planted along the Lookout trail in honor of Ben and Margaret Hall’s 80th birthdays. They are major supporters and donors of UW Botanic Gardens.

Raoulia australis close-up

Raoulia australis close-up

McVay Courtyard  Raoulia australis grndcvr

McVay Courtyard
Raoulia australis grndcvr

The McVay Courtyard renovation is mostly completed now thanks to Riz and Annie and contains many new additions. The original designer, Iain Robertson,  specified renewing the 3 distinct plant groups: Bulbs, Groundcovers and Shrubs. The existing grove of Acer palmatum ‘Aconitifolium’ which were carefully worked around and a few Osmanthus are all that remain of the original tree and shrub palette  Iain’s new design incorporates elements of interesting plant architecture, habits and striking bark. Hence his use of several types of Arctostaphylus, the unusual divaricating shrub, Corokia, Rhododendron moupinense, Rh schlippenbachii, and several tidy groundcovers that mimic inanimate forms, such as Raoulia and  Bolax. For the bulk of color, Iain chose a wide-range of spring and summer flowering bulbs.  Though the garden looks a bit austere at the moment, as any newly planted landscape does, we’re looking forward to a quick and healthy establishment and growth period this spring and summer. For those that miss the striking habit of the Nolinia, no need to panic, they were successfully transplanted  to the adjacent cistern slope and new stairs  to the south.
Washington Park Arboretum is once again a UW-Restoration Ecology Network capstone site. The student group known as the ”A-Team” has designed a weir system in the north “wet” zone of the holly collection. They will be continuing construction and planting this spring. Ryan and company decided it’s better to flow with nature rather than fight it. This new feature will, over time, become a healthy wetland area and will immediately reduce both UWBG and City Parks maintenance input, i.e., mowing and weed control.

"A-Team" installing weirs

“A-Team” installing weirs

The Winter Garden was in showcase form as it should be during the winter. Roy has been busy procuring new plants primarily for the new drainage area in the SE quadrant of the garden. We’re looking forward to having an updated brochure and map next winter. There’s still time to catch some of the late winter, early spring flowering plants such as Corylopsis and Magnolia.
Gardeners, Rhett and Preston, took on the tatty northeastern most corner of Rhododendron Glen. Pruning out several years worth of Rhododendron rootstock growth and removing deadwood in the grove, removal of several poor or dead specimens, and lots of sheet mulching! Wow, I’ve never seen it so good and I’ve been around these parts a long time.

Chris and Darrin spent several days up at the double parking lot along the Broadmoor fence tackling deferred storm damage cleanup and improving view corridors. I would expect ne’erdowells will think twice about using this area for their dirty deeds for quite some time.

Adding soil to Chilean Gateway via conveyor belt system along LWBlvd


Adding soil to Chilean Gateway via conveyor belt system along LWBlvd

The Lake Washington Blvd curbside area along the Chilean Gateway is vastly improved as a result of over 120 yards of new soil  brought in to create “fingers” at the toe of the slope. This new design will hopefully deter pedestrians from walking through the Gateway and stepping on our plants. Also, with improved drainage, we now can grow Elymus magellanicus without drowning its roots. There are also several new Chilean taxa planted throughout the Gateway that over time as they get bigger will create that Wow! sensation, either up close or from a distance. They include: Gunnera magellanica, Ourisia coccinea, Mitraria coccinea to name a few.

Will spring be as boring too? The UWBG horticulture staff certainly hopes so.

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Building the New Zealand Focal Forest, Pacific Connections Update

March 11th, 2013 by UWBG Horticulturist

The 2.5 acre New Zealand focal forest construction project is scheduled to be completed by the end of June.  W.S. Contractors LLC  is currently finishing up infrastructure details, including the future bus turnaround and toilet area located across Arboretum Drive from the NZ focal forest in the future Australia exhibit. Irrigation system installation will begin later this month through May. Planting will begin in June. There will be approximately 10,000 total plants representing over 90 taxa for the 9 plant communities that will be represented.  Garden dedications have been tentatively set for September 13 and 14.

In tandem with the 2.5 acre NZ focal forest project, the Lake Washington Blvd street lighting upgrade through WPA is completed. The Olmsted inspired lamps installed with modern LED bulbs is a huge aesthetic and vehicular safety improvement.   Also, the lower section of the Chilean Gateway re-do will be wrapping up with new plantings in the coming weeks. Our goal for the lower Chilean Gateway is to make it uninviting for pedestrians to walk curbside and trample our plants. We accomplished this by creating raised “fingers” and small berms close to the curb by adding over 120 yards of soil amendment. The well-draining soil-mix will also provide much better growing conditions for the Chilean blue wheatgrass, Elymus megellanicus, than before.

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Seasonal Horticulture Update: “The Summer of Our Content”

November 3rd, 2012 by UWBG Horticulturist

Hydrangea by Harpa KarinUWBG Horticulture and Plant Records staff had a very busy, productive and satisfying summer. A cold wet June and early July pushed extraordinary plant growth, and, oh my, the WEEDS…Then, just as quickly as we could say, “No summer in Seattle”, the heavens went dry and lo and behold, we experienced an historic dry spell extending our summer to October 12. See King 5 news story starring, horticulturist and new plant care team member, Neal Bonham.

http://www.king5.com/news/local/If-today-stays-rain-free-driest-August-on-record-168165016.html

In hindsite, this weather pattern was just what the plant doctors ordered. A prosperous longer than usual planting window followed by a longer than usual dry period enabled us to plant into late June and then complete several landscaping projects into October.

For example, the contractor hired for constructing our 2.5 acre New Zealand eco-geographic display in the Pacific Connections Garden lucked out big time grading the steep, fortunately dry glacial-till slopes with heavy equipment. On a smaller scale, we were able to sneak a new berm in the hollies, which will eventually accommodate new specimens in the American clade. If you visit, check out the new interpretive signage.

It was all about NAIOP’s 22nd annual community enhancement project on the other side of the water at CUH. Early on in the planning stages, our associate director, Fred Hoyt, kept saying this event could be a game-changer for us. As time wore on and the project scope was scaled-back, it began to seem his prognostication would not come to pass. Now, after all is mostly said and done, if not a game-changer, it was most certainly HUGE for much needed improvements and indeed a springboard for potential future projects on our CUH campus, gardens and UBNA that will be appreciated by all for years to come.

I’m particularly excited about the huge effort that went into upgrading our plant production and corps yard area behind DRC. It’s amazing what laying down new gravel and paint can do for a tired looking nursery and storage space. And, just in the nick of time, we will now be able to overwinter lots of plants in a completely restored hoop-house.

Time now to blow the horn, as I would be remiss as a supervisor by not extending praise to my hard-working dedicated staff. Everyone contributed greatly to the enormous summer’s contents worth of planning, preparing, implementing and, of course, maintaining the grounds, gardens and plant records, including all the volunteer programs we’re involved with, throughout our botanic gardens. Here are a few of our summer accomplishments, not previously mentioned, and in no particular order:

  • A newly installed Winter Garden drainage system in the recently renovated SE quadrant. This was a joint operation between UWBG and City Parks crews. Implemented due to waterlogged soils not foreseen in the original bed renovation. May all our efforts pay off for healthy Winter Garden displays in the future!
  • A complete unabridged inventory and review of our plant collections within the Japanese Garden. Believe it or not, this is the first inventory taken since the UW gave up managment of the Japanese Garden to Seattle City Parks and Rec in 1981!
  • The Soest lawn has been renovated. Long overdue. You shoulda seen the thatch pile!
  • The incredible planning and installation for the “Music of Trees”!  Last weekend before UWBG arborist, Chris Watson, and the artist, Abby Aresty, begin the tedious task of dismantling the complex engineered designs.
  • Forest ridge middle-trail restoration in WPA. An Eagle Scout project and another joint operation between UWBG and City Parks staff.
  • Brubaker Quaking Aspen Grove maintenance project. Ask arborist assistant, Darrin Hedberg, where to find it.
  • Another successful and fun “Day of Caring”! Joint operations between all three arboretum partners: AF, UWBG and City Parks.
  • Completion of our 4th year of our 5 year DOE Garden Loosestrife grant. Although we are making headway, there are big challenges that lay ahead for this noxious weed.

And now that it is indeed officially fall and a surprising colorful one at that, it’s onward marching soldiers to another ambitious fall/winter planting season…Coming attractions include continuing McVay courtyard renovation and a Capstone REN project in the hollies to name a few.

Happy Holidays blog readers! Stay warm and cozy and renew your gardening senses by visiting UWBG!

 

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