Ask a Question forum: Brown spots on monstera leaves

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Stockholm, Sweden
EileenPal
Dec 6, 2017 6:49 AM CST
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Hi, I brought a newly purchased monstera to my office about a year ago. It's been growing well, but recently most of the leaves started developing spots -- some worse than others (see pictures).

My office gets direct sunlight, albeit through four panes of glass. The plant is not right in front of the window, either. Is the light too low? Should I get a plant light?

The temperature is constant at about 70-72 degrees. I was watering generously for awhile, often with plant food (I think you can tell the content because of the chemical abbreviations in the image), but I recently discontinued that. I'm sure I'm doing something wrong - but what?

Thank you in advance!

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Name: Will Creed
NYC
Professional indoor plant consultan
Image
WillC
Dec 6, 2017 5:54 PM CST
Eileen - It would be more helpful if you posted a photo that shows the entire plant, including its pot.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
I now have a book available on indoor plant care
Stockholm, Sweden
EileenPal
Dec 7, 2017 1:59 AM CST
WillC said:Eileen - It would be more helpful if you posted a photo that shows the entire plant, including its pot.


Thank you - here's a more complete picture.
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Name: Will Creed
NYC
Professional indoor plant consultan
Image
WillC
Dec 7, 2017 5:56 PM CST
Thanks, Eileen. Overall your Monstera looks pretty healthy, although it appears that it is getting less than optimal light. The pot is pretty large and you need to be careful to allow the top inch or so of soil to get quite dry before watering.

The spots don't appear to be extensive. If they are not appearing on new leaves, then I don't think the problem continues. I would suspend fertilizing and don't use hard water.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
I now have a book available on indoor plant care
Stockholm, Sweden
EileenPal
Dec 8, 2017 2:22 AM CST
Thank you, Will. I will try your suggestions. Sounds like I need to water less.

We are heading into the darkest part of the year here, so I will probably try a plant light, as well. (It might benefit ME, as well.)

Thanks again.
Name: Paula
NYC suburbs (Zone 6b)
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Turbosaurus
Dec 8, 2017 4:28 AM CST
Leaves don't last forever. They will eventually die. It not necessarily something to be concerned about, but...

This is a 6 month old monstera that got plenty of light- I took 3 cuttings from the mother plant in June and hung it a densely shady spot, hung from the branches of a dog wood tree in full shade outdoors. The comparison should give you a reference for how much light your plant is actually getting :

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Light will usually be your limiting factor so fertilizers are not important unless you are overdosing. They can be more harm than good if you're pumping in minerals and ions your plant cant balance. If you use a water softener that can cause problems over the long term.

Its probably just age.
[Last edited by Turbosaurus - Dec 8, 2017 4:29 AM (+)]
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Stockholm, Sweden
EileenPal
Dec 8, 2017 10:35 AM CST
Oh wow. That six-month-old monstera looks great! I really am going to try getting more light to mine (and watering and fertilizing less).
Thanks!

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