- Author: Missy Gable
Words like 'invasive plants' or 'weeds' often have a negative connotation for a good reason. Both words describe plants growing where they are not wanted or welcome. Plants that have a propensity to spread quickly result in habitat loss for native plants, insects, birds, and other animals. This is incredibly destructive to our natural environment and the landscape that Californians love to call our own.
Fast spreading invasive plants can quickly and dramatically change a plant community from a diverse one to a monoculture. When these plant communities shift, wildlife loses food, water and shelter resources and are forced to move out or perish.
Unfortunately, this description is not an over-dramatization. As Californians, we must communicate frankly about the impact of invasive plants in our environment. This is an important issue that can easily grow out of control. One of the biggest challenges with invasive plants is that they oftentimes have desirable features, like beautiful flowers or a spreading habit that quickly covers a barren patch in a home landscape.
Well-intentioned people have sold, purchased, propagated, and harvested plants that are known to be invasive. When done so knowingly, the gardener may use the excuse that they will watch the plant and not let it get out of control. Unfortunately, there is no way to monitor a plant that is distributed by wind, birds and other sources. It may be possible to monitor that your plant doesn't ‘escape' to the neighbor's garden but what about the seeds that blew off in the wind and established on a hillside two miles away?
Paying attention to signage and programs that identify invasive plants is an important part of caring for our environment. When questions about weeds and invasive plants arise, the UC Master Gardener Program is available locally to support good decisions and help us all be stewards of a healthy California.
Trained and certified volunteers utilize the vast network of information and expertise of the University of California to support gardeners and concerned citizens. You can reach your local county program online at mg.ucanr.edu/FindUs/.
It's Invasive Species Action Week – let's work together to be better, do better, and grow better.
California Invasive Plant Resources:
- California Department Fish and Wildlife
- Weed Research & Information Center (UC ANR)
- UC Integrated Pest Managment
Spend your lunch learning about invasive species. Brought to you by UC Agriculture and Natural Resource and the California Invasive Plant Council, come hear from the experts about emerging tree pests, aquatic invasive species, and invasive weeds and fire.
- Shot hole borers and other threats to California's trees (June 5, 12:10 - 1pm)
- Quagga mussels, nutria and other threats to California's water bodies (June 6, 12:10 - 1pm)
- Invasive plants and fire in California (June 7, 12:10 - 1pm)
Join from a PC, Mac, iPad, iPhone or Android device:
Please click this URL to join. https://ucanr.zoom.us/j/401190822
Or join by phone:
Dial(for higher quality, dial a number based on your current location):
US: +1 (646) 558-8656 or +1 (669)900-6833
Webinar ID: 401 190 822
- Author: Chris Crawford
- Editor: Melissa G. Womack
Participation in the 2015 Spring Nursery Survey is easy, educational, and fun! Volunteers will:
- View an online training
- Download required survey materials (e.g. survey form & plant ID key)
- Sign up to survey a randomly selected store in their county
- Visit the store and record information about any invasive plants being sold
- Submit information to PlantRight
PlantRight will host two training webinars to reflect different survey periods for Southern California (San Luis Obispo, Kern San Bernardino Counties and south) and Northern California:
Sign up at: www.plantright.org/survey-registration
“2014 saw many common invasive plants decline in availability, yet some are more popular than ever. Help us prevent the next big invasive by making the 2015 survey our most successful yet!” –Chris Crawford, PlantRight Survey Manager
2014 Survey Highlights
Driving this positive change was a large decrease in periwinkle (Vinca major), dropping from 17% in past years to 9% of surveyed stores. However, the number of stores selling the most recently added invasive plants on PlantRight's list (updated in early 2014) increased. Notably, the drought-tolerant emerging invasive Mexican feathergrass (Nassella tenuissima) increased in prevalence from 27% in 2013 to 38% in 2014.
A comprehensive report and simplified fact sheet detailing the results can be found on the Spring Retail Nursery Survey – 2014 Fact Sheet. These results act as PlantRight's guiding light, shaping its strategy and helping it move forward collaboratively with the nursery industry.
2015 New Plant List
After a year-long review, PlantRight is very excited to share its brand new 2015 list of Suggested Alternatives for Invasive Garden Plants. This list identifies the top ten priority invasive plants for sale in California and provides recommendations on beautiful alternatives. Without the help of the UC Master Gardeners and the data collected from the annual spring survey, the new and improved list would not have been possible.
-- For questions, contact Chris Crawford, PlantRight Survey Manager, at email@example.com or (415) 977-0380, ext. 331.