Cal IPC Symposium 2016 Bob Case

Attendees at the Cal IPC Symposium 2016. Photo by Bob Case

Cal-IPC provides several resources to help Californians fight the spread of invasive plants. In addition to the Inventory of invasive plants, we gather an annual Symposium, and maintain a library of resource material.

Dispatch Newsletter

Read the latest Dispatch Newsletter for updates on invasives, or peruse the archive for more than 20 years of information. The newsletter is mailed to Cal-IPC members – join today to make sure you get the next copy!

Cal-IPC Symposium

The Annual Cal-IPC Symposium is a great opportunity to meet with other land managers, researchers, and conservationists. We gather to learn, share information, and celebrate success. Join us in Chico or Online, Oct. 25-28, 2023

This page also contains links to archived proceedings from more than 25 years of Symposia.


Our rich library of information includes books, reports, and brochures. Some items are available to purchase through the Cal-IPC store. Many items are available online as PDF documents. The library also includes a selection of training videos.


CalWeedMapper provides a dynamic tool for mapping invasive plant distribution at the landscape level using expert knowledge.

Cal-IPC Shop

Buy a range of books, reports, and brochures to help your land management efforts.

Volunteer Resources

California’s wildlands depend on our volunteers. We’re here to help, with information on managing and training volunteers for weedwork.

Student and Early Career Resources

Managed by fellow students, the Cal-IPC student section is dedicated to expanding opportunities for students interested in invasive plant research and management.

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