Uploaded April 2026 | Updated September 2026, 1 week ago
Crown gall is one of the most misunderstood diseases in rose growing, often triggering unnecessary panic and drastic online advice to burn your plants and discard your soil. In this video, we tackle a viewer’s questions about a suspected outbreak to break down the actual science behind Agrobacterium tumefaciens. We explore how to distinguish a true genetic tumor from normal wound-healing callus, explain why this chronic soil bacteria is completely different from acute threats like Rose Rosette Disease, and resolve the conflicting advice given by plant pathologists versus commercial growers. By understanding the biology of how the pathogen operates in open ground versus closed container systems, you can skip the panic and make rational, evidence-based decisions for your own roses.
If you find these videos useful, here are a few things you can do to help us out:
Send a tip: buymeacoffee.com/fvrosefarm
Use our coupon code: rosefarm at High Country Roses for 20% off
highcountryroses.com
Have a look at our Amazon shops!
US: amazon.com/shop/fraservalleyrosefarm
Canada: amazon.ca/shop/fraservalleyrosefarm
Drop us a "Like" on our Facebook page:
facebook.com/FraserValleyRoseFarm
Leave a review of our farm on Google:
https://g.page/r/Cfi8qXv8QReZEBE/review
For shareable articles on roses and gardening:
fraservalleyrosefarm.com
rosapedia.com
Crown gall is one of the most misunderstood diseases in rose growing, often triggering unnecessary panic and drastic online advice to burn your plants and discard your soil. In this video, we tackle a viewer’s questions about a suspected outbreak to break down the actual science behind Agrobacterium tumefaciens. We explore how to distinguish a true genetic tumor from normal wound-healing callus, explain why this chronic soil bacteria is completely different from acute threats like Rose Rosette Disease, and resolve the conflicting advice given by plant pathologists versus commercial growers. By understanding the biology of how the pathogen operates in open ground versus closed container systems, you can skip the panic and make rational, evidence-based decisions for your own roses.
If you find these videos useful, here are a few things you can do to help us out:
Send a tip: buymeacoffee.com/fvrosefarm
Use our coupon code: rosefarm at High Country Roses for 20% off
highcountryroses.com
Have a look at our Amazon shops!
US: amazon.com/shop/fraservalleyrosefarm
Canada: amazon.ca/shop/fraservalleyrosefarm
Drop us a "Like" on our Facebook page:
facebook.com/FraserValleyRoseFarm
Leave a review of our farm on Google:
https://g.page/r/Cfi8qXv8QReZEBE/review
For shareable articles on roses and gardening:
fraservalleyrosefarm.com
rosapedia.com
