April 30th, 2013 by UWBG Horticulturist
As we bid adieu to relentless April showers, let’s also praise a fond farewell to over 300 relentless April community service volunteers that helped support the stewardship of our beautiful botanic gardens. Because of them, May flowers have never looked and smelled soooo good.
Student Conservation Association 2013 Earth Day at the Washington Park Arboretum. Photo curtesy of SCA.org
The 3 Big April events:
- April 13, Earth Day in the Arboretum w/ Student Conservation Association – see photos http://www.flickr.com/photos/the-sca/sets/72157633264603184/
- April 19, UW Partners w/ Starbucks for Earth Day at CUH and Farm- see video
- April 25, Ivy Out w/ Seattle Prep - a few photos below
Seattle Prep students removing ivy in the hollies
Seattle Prep students removing ivy in Pinetum
A few of the impressive metrics:
- Over 22,000 sq feet of invasive plants removed (ivy and blackberry)!
- Over 60 yrds of mulch spread!
- Over 1500 native plants planted!
- Over 20 yrds of ivy hauled!
August 4th, 2011 by UWBG Horticulturist
UW Botanic Gardens has begun its 4th year of the 5yr Dept. of Ecology, Garden Loostrife eradication project.
Our contractor, NW Aquatic Eco-Systems, has scheduled initial spray applications to commence on July 31 – August 1. Another application will be scheduled week of August 6th. Postings of project and current spray dates are located at all public accessible waterfront locations. There will be a final follow-up application in September.
Lysimachia vulgaris, Garden Loosestrife, a non-native wetland species is invasive in this area. State listed as a class B noxious weed, it requires control by the land manager UW Botanic Gardens as mandated by King County Noxious Weed Control Board.
- Approximately 5 miles of shoreline property bordering Union Bay including Foster and Marsh Islands in the Washington Park Arboretum
- An initial and follow up spray application to occur between July 15 and October 1
- Both shoreline and land side application of the herbicide Renovate 3 (triclopyr), a selective broadleaf herbicide.
- Non toxic to fish and their food web.
- No significant risk to birds or mammals
June 7th, 2011 by UWBG Horticulturist
A loosestrife by any other name. . .
If you have trouble remembering this plant’s name, you might try thinking of the strife it has let loose on our wetlands.
In 2009, the Department of Ecology awarded the UW Botanic Gardens a 5-year grant for the control of garden loosestrife (Lysimachia vulgaris), a class B noxious weed mandated for control by the King County Noxious Weed Control Board. Now we’re hosting a symposium featuring the latest observations and expertise on aquatic weed management.
In his keynote address, Steve Manning, founder and president of Invasive Plant Control, Inc., will present economically and environmentally sound techniques for controlling invasive aquatic weeds. You’ll also hear from King County Noxious Weed Specialist Katie Messick and representatives from the UW Botanic Gardens and Seattle Parks Department. The afternoon will be devoted to a kayak or walking tour (your choice) through Lake Washington’s wetlands, one of garden loosestrife’s primary haunts in this region.
Designed for professional audiences, this symposium is open to everyone interested in aquatic weeds and their control.
Managing Aquatic Weeds: Challenges and Opportunities
Wednesday, July 13, 9:00 AM-3:30 PM
Graham Visitors Center, Washington Park Arboretum, 2300 Arboretum Dr. E, Seattle
Professional Credits: WSDA, WSNLA (pending)
Symposium with Kayak Tour, $55; Symposium with Walking Tour, $30
Box lunch included when you register by July 10: 206-685-8033 or online
May 29th, 2011 by Jake Milofsky - UBNA RA
This spring quarter wrapped up a wonderful season of restoration events in the Union Bay Natural Area, with fantastic progress being made on several projects. Tallying 177 individual visits in the spring quarter, students and community members collectively donated over 400 hours of their time to the restoration efforts being made in UBNA!
The northern end of Yesler Swamp saw a major improvement with the removal of a large monoculture of Himalayan blackberry. UW students and the UWBG partnered with the Friends of Yesler Swamp to complete this work and install a suite of native plants including Indian plum, red-flowering currant, snowberry, Douglas hawthorne, ocean spray and live willow stakes. Maintenance will continue in the coming months as volunteers return to weed this area and support the growth of these newly installed plants.
A community volunteer helps remove bindweed from live willow stakes in Yesler Swamp
A large amount of effort was put forth this season in the newly established woodland at the western end of Wahkiakum Lane as well. What had seemed like an impenetrable sea of Himalayan blackberry during the winter quarter was tamed by the efforts of many students in UW’s Environmental Science course. As they supplemented their course work with these service learning opportunities in ecological restoration, they also saw many native species appear from below the blackberry as they cut, pulled, and dug it out of the ground.
A big thanks goes out to everyone who participated in this year’s efforts!
September 14th, 2010 by UWBG Horticulturist
UWBG IPM staff will be out on Union Bay, Wednesday, September 22nd, w/ spray contractor NW Aquatic Eco-Systems. All canoe landings and shoreline trailheads will be posted. This is the second of two follow-up spray applications in our effort to control the class A noxious weed, Garden Loosestrife.
August 13th, 2010 by UWBG Horticulturist
Garden Loosestrife (GL) control contractor, NW Aquatic Ecosystems, along with UW Botanic Garden IPM staff, will complete initial 2010 treatment on Wednesday, August 18th. The Waterfront Trail between Foster Island and MOHAI will be closed early am to public temporarily for contractor access to GL growing near the trail. Signs will be posted on barricades at both trailhead entrances and also staffed during spray period to avoid public breaching the barricades. Trail will be reopened once material has dried on foliage. The remainder applications will be accomplished via boat in and around Marsh and other islands and inlets throughout UW Botanic Gardens managed Union Bay shorelines.
Scheduled pm Kayak tours will not be disrupted. Applications within tour boundaries will be completed in am.
There will be a follow-up treatment later in September. Notice will go out as soon as date is set.
For further information, call 206-543-8800
July 29th, 2010 by UWBG Horticulturist
For a second year, Northwest Aquatic Eco-Systems along with UW Botanic Garden will begin spray work to control Lysimachia vulgaris (garden loosestrife), a state-listed noxious weed occurring along Union Bay shorelines including the Union Bay Natural Area and the Arboretum’s Foster and Marsh Islands the first week of August. King County requires control of this aggressive and invasive weed, which poses a serious threat to the native character of area wetlands. In 2009, DoE provided a 5-year grant for $75,000 to fund loosestrife control.
In mid-July members of King County’s Noxious Weed Control Program and UW Botanic Gardens staff mapped the extent of the weed in the areas listed above. Comparison of the maps from year 1 to year 2 demonstrated slight control had taken place. Once again the weed will be controlled with an aquatically approved herbicide by the contractor, Northwest Aquatic Eco-Systems using airboats and other specialized equipment.
King County Garden Loosestrife Fact Sheet