Canopy Weed Program

Urban Conservationist Mary Logalbo shows your step by step instructions on removing invasive ivy from your land.

If you own a small piece of woodland or land in and around Forest Park, you’ve probably already seen ivy and clematis that have taken over parts of the TreeIvyRemoved_CottrelleRefuge_BB(ML)_2012_04_12park, threatening trees and native plants. Invasive vines prevent trees and bushes from getting sunlight, can spur disease and rot and add considerable weight to trees, eventually weakening and killing them. Falling tree limbs can also be a serious hazard.

In cooperation with the Forest Park Conservancy and Portland Bureau of Parks and Recreation, we can treat invasive weeds FREE of charge if the infestations are in our targeted work areas.

The weeds we’re talking about are English ivy (Hedera helix), Atlantic/Irish ivy (Hedera hibernica) and Old Man’s Beard/Traveler’s Joy (Clematis vitalba). They are non-native, aggressive European vines that can completely blanket trees and other plants. On the ground, vines crowd out native wildflowers, ferns and tree seedlings. Mats of ivy often become home to pests like the Norway rat, which you don’t want around your house! Because ivy roots are shallow, heavy rain running underneath the plants can cause the entire mass of ivy and soil to dislodge and slide downhill. Ivy roots also get into your home’s wood and mortar, causing structural damage.

To participate in this program simply fill out and submit the form below. We simply require that you keep ivy off your newly cleared trees and allow us to come back and check them occasionally over the next five years to see if the program is successful. The number of projects we take on is dependent on funds available.

West Multnomah SWCD (, Forest Park Conservancy ( and the Backyard Habitat Certification program ( can offer additional technical assistance and holistic planning to help you address all of the conservation issues on your property including other invasive species removal, native plant establishment, stormwater management and wildlife enhancements.

Help us save your trees and slow the spread of these invasive vines!

Click here for information on removing ivy from your urban garden.

Click here for information on removing ivy from larger acreages.


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