Q&A – What is this growth on my blackberry bush?

480 views · Published 4 August 2018 · 1:16 · Indexed 22 September 2026

Channel: Family Plot Garden · 2018 · Howto & Style

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This is blackberry knot gall. It is caused by a wasp. The wasp lays its eggs in the blackberry cane and the plant swells up which creates a place for the wasp larvae to live. It does not hurt the plant but if you would like you can prune it out.

Here are some more videos about blackberries:
Planting Blackberries: https://www.youtube.com/watch?v=GpG8P8P2UkI
Building a Blackberry Trellis: https://www.youtube.com/watch?v=s-ONWpNjiPo
Preparing Blackberry Plants for Winter: https://www.youtube.com/watch?v=48ABvFN9XVE

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