Problem With Dahlia Stems

Question

We have two white Dahlias in our garden. The leaves on one are turning yellow, but on looking at the bottom of the stems, we notice a growth which looks like a Broccoli head surrounding all stems? Could you advise please

Answer 1

Unfortunately, your photo did not come through. It could be bacterial or fungal, though. a fungicide can help, but if the damage has progressed too far, then it may be best to start over. These articles will help:

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

https://www.gardeningknowhow.com/ornamental/bulbs/dahlia/tips-dahlia-planting.htm