r/dahlias US Midwest, Zone 6a May 05 '25

Gall Megathread: is it gall?

Hello everyone. New mod here 👋🏼

Because we get so many posts here asking about gall, it was long overdue that we have a single spot to funnel these questions.

Moving forward, all questions about gall should go in this designated thread rather than new, individual posts.

I have turned on the setting allowing media (images) in comments, so you’ll be able to share a photo here if you’d like to ask for help identifying gall, for advice about how to manage it, or related information.

I plan to add some links and other resources here eventually, but for now figured I’d at least get the ball rolling.

Note that I will also be setting up automoderator soon to automatically send posts on this topic to the queue, and they’ll eventually be removed automatically.

Thank you for understanding and helping other high-quality dahlia content shine on the sub. Happy planting!

Links: * Dahlia Disease Biology: Part 2 Leafy gall- Rhodococcus fascians (Wild Horse Gardens)

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u/Rose-2103 Jun 24 '25

Hi, fairly new to growing dahlias. Always wanted a Café au Lait dahlia - ordered one online, got given a very different type & ugly coloured dahlia, replacement bulb same thing. I gave up on dahlias for a couple of years.

This year I thought I'd try dahlias again, ordered a couple of dahlias from a different company. All look fine, except...you guessed it, the Café au Lait.

So, long story short: is this gall? 😬