Ask a Question forum: Bacterial leaf spot on Monstera Deliciosa?

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Name: Monica
San Francisco, CA
Mar 18, 2017 7:16 PM CST
Hi there,

I have a few large split philodendron plants that I've been growing for years (they all came from one plant that I split 3-4 years ago). Recently I've started to notice that the two largest ones have brown spots with a yellow ring. At first I thought they might be getting burned by sunlight, but now I'm realizing it's probably bacterial leaf spot. From what I've read online, it seems I need to cut off the leaves that are affected as this is contagious? One of the plants has several leaves that have at least a few spots, and its' new growth has also been stunted or showing up with the spots Sad I've also noticed that some of the aerial roots are shriveled up and dried out, as opposed to the plump, healthy-looking roots. It does still have some leaves that are not at all affected - is it possible to save it? I honestly have not been watering it a ton in the past year (maybe once every few weeks and fertilizing every 3-4 months). I have never misted it, and it's been a couple years since I've repotted it. I think it does need repotted, but I don't want to shock it by cutting a bunch of leaves off and repotting it all at once.

The second plant only has small spots on the leaves - is it possible to just cut the spots off or will I need to cut the whole leaf off? I also read that there are some solutions with baking soda and dish soap that can be made to help treat this problem - any recommendations on that?

I've posted some photos below of both plants. The first 3 are from the larger, more affected plant and the second 3 are from the second plant I mentioned.

Any help and advice is much appreciated! Thanks!

Thumb of 2017-03-19/pheathers/1b8296
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Thumb of 2017-03-19/pheathers/6fc889
Thumb of 2017-03-19/pheathers/70155b
Thumb of 2017-03-19/pheathers/b7de93

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