Ask a Question forum→What's happening to my monsteras?

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London
Bb92
Jun 13, 2020 11:49 AM CST
Hi all,

Would very much appreciate some thoughts on my monsteras. I've had both for quite some time with no problems. They're about 2 feet from a west facing window, in pots with good drainage. I only water when the top 2-3 inches are dry. I've noticed both plants have developed light / pale spots on them. I'm not sure if this is something to worry about? On my deliciosa it's on an old leaf, but on my adansonii on newer leaves. Should I be worried?

Thanks in advance for any help!
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Name: one-eye-luke US.Vet.
Texas (Zone 8a)
Quitter's never Win
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oneeyeluke
Jun 14, 2020 1:39 AM CST
You shouldn't worry just yet, because it's normal for older monstera leaves to fade. If your growing shoots on top are healthy then losing an older leave is ok. Don't worry at this time. Thanks for sharing.
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London
Bb92
Jun 16, 2020 10:13 AM CST
Thanks for your reply! I guess my main concern was that on the adansonii the leaves with the light green spots are new ones.
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Jun 16, 2020 10:19 AM CST
Monstera adansonii is a plant that is very susceptible to viral infections for which there is no cure. It is hard to know from photos if that is affecting yours. The fact that the discoloration is showing up new growth is not a good sign.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
London
Bb92
Jun 16, 2020 10:36 AM CST
Hi willc, thanks for your reply. I really hope it's not something like that! What should I look out for that might provide further evidence of infection?
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Jun 16, 2020 10:42 AM CST
Only a lab analysis can provide a definitive diagnosis. However, if you do a search for symptoms of a mosaic virus on Monstera adansonii you will find some photos.

In the interim, keep it away from other plants and be careful how you handle it. If it were mine, I would discard it. But I also wish they would stop selling this plant, especially online from unreliable sources.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
London
Bb92
Jun 16, 2020 12:00 PM CST
Hi willc, fortunately it doesn't look like mosaic virus! There's no mottling. That's interesting to know- I didn't realise adansoniis were so problematic.
Name: Gina
Florida (Zone 9a)
Tropical plant collector 35 years
Region: Florida Tropicals Aroids
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Gina1960
Jun 16, 2020 4:20 PM CST
It looks like a nutrient deficiency to me. Epiphytic aroids grown in containers are often victims to potting substrate that is low in Boron and Manganese. You should use a fertilizer that has the trace and micronutrients added, or if you can;t find that, you can buy them separately and use them as an additive to a water soluble. Dolomite, a product derived from limestone, is also quite helpful in maintaining the nutrient balance with containerized aroids
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London
Bb92
Jun 17, 2020 2:11 AM CST
Hi Gina, thank you that's interesting. I'll segregate the plant in case it's mosaic virus for the time being and have a look for some suitable fertiliser.

Whilst it is generally newer leaves displaying this discolouration on the adansonii, the three newest leaves (pictured) do actually look generally healthy. There are still new shoots growing. So I'm praying it's not mosaic virus!

Thanks everyone for your help :)

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Name: Gina
Florida (Zone 9a)
Tropical plant collector 35 years
Region: Florida Tropicals Aroids
Image
Gina1960
Jun 17, 2020 5:18 AM CST
Uneven yellow coloration is usually due to uneven/deficient nutrient absorption in aroids
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