October 7th, 2013 by Sasha McGuire, Education Program Assistant
You may think fall and winter is a time for rest for your garden. Get prepared this fall so your garden will be supercharged come spring!
Register Online, or call 206-685-8033!
Protecting tender plants
In this FREE class taught by a Master Gardener, find out what you should do in your garden in the fall to prepare it for winter and make your garden chores easier come spring. You can help give it a gentle transition into the winter season by performing a few important tasks that will not only make the winter garden more appealing but also able to better handle the cold temperatures ahead.
By doing these simple things, your garden will be ready for winter and further ahead for next spring.
Join us on Saturday, October 26th from 10-11 to see how to put your garden to bed!
Soest in the Fall and Spring
Join the Soest Garden gardener Riz Reyes for this hands-on workshop on fall perennial garden care. Walk the extensively planted beds and learn about which plants to cut back now, and which ones to leave until spring. Learn how to divide and transplant specific types of plants, and some tricks and techniques for maintenance practices that create visual appeal for the dormant season. Riz will also share his favorite “tried and true” selections for fall interest.
Participants should bring their own hand-pruners, gloves, and hori-hori soil knife, and dress for the weather.
Join the class on Saturday, November 9th, from 10am-12pm; $25/person.
October 7th, 2013 by Pat Chinn-Sloan
Selected cuttings from the Washington Park Arboretum (September 30 – October 13, 2013)
The Good, The Bad and The Ugly (Minus the Good)
1) Cherry Brown Rot
- A fungal disease of the Prunus species caused by Monilina fructicola and Monilina laxa.
- The first symptoms often seen are browning and collapse of the blossoms, followed closely by death of the small twigs.
2) Dogwood Anthracnose
- Dogwood anthracnose is a disease of flowering and pacific dogwoods (Cornus florida and C. nuttallii).
- An anthracnose fungus, Discula sp., has been identified as the causal agent.
- Infection of dogwoods is favored by cool, wet spring and fall weather, but can occur throughout the growing season.
3) Elm Leaf Miner
- Elm leaf miner, Fenusa ulmi, is a pest that feeds on the tissues in between the outer layers of elm leaves, causing browning and leaf drop. Although primarily an aesthetic pest, leaf miner damage can stunt or weaken a tree when the population in the tree is high.
- The elm leaf miner has been in the Northwest for a few years, but recent expansion has been noticeable in Washington and Oregon recently.
4) Powdery Mildew on Rhododendron
- The fungus Microsphaera azalae is found throughout the Pacific Northwest on Rhododendron species and hybrids.
- Contrary to popular opinion, powdery mildew outbreaks are not favored by rainy weather. Steady rain tends to wash mildew spores off the foliage before they have a chance to penetrate the tissue. Mildew is more commonly associated with high relative humidity and the light coating of dew that forms on leaves when cool nights follow warm days.
5) Sorbus Sawfly
- The Sorbus Sawfly (Pristiphora geniculate) is a new pest in western Washington. It was first noticed in the spring of 2009 in the Everett, Lynnwood and Monroe areas.
- Sawflies that are new to an area tend to build up in large numbers and can cause significant defoliation. Sawfly larvae typically eat continuously and then drop out of sight (to pupate in the soil). Damage appears to occur overnight. Control of the first generation will reduce the number and severity of defoliation by the second and third generations.