Houseplants forum→Spider mites and new growth on calathea

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Jas11
Jul 23, 2021 2:36 AM CST
Hi Smiling ,
I would like some advice on my calathea which is infested with spider mites. I bought my second calathea a few months ago and the same thing happend as with my first Calathea. It started off with a few leaves dying. I tried everything to get rid of the mites but nothing worked. By now I had to trim the plant by around 80% and the remaining 6 leaves don't look too good, however they don't seem to die completely in the near future. (Just some brown dry spots etc.).

This morning however I found some new growth on my Calathea! There are growing 2 new shoots. I was very excited and checked the rest of the plant. I soon realised that the amount of mites grew immensely on my remaining leaves. Of course I want to regrow my Calathea from start now that there's new growth. The problem is that I don't want the new leaves to get infested when they'll eventually start to grow. So: Do you think I can just cut off ALL the remaining leaves to get rid of all the mites? I'm afraid the new growth will be affected since there wouldn't be any leaves left to perform photosynthesis.

I would love to hear your advice and hopefully be able to safe my plant. Thank you! Thank You!


Thumb of 2021-07-24/Jas11/5b49c7

[Last edited by Jas11 - Jul 24, 2021 7:27 AM (+)]
Give a thumbs up | Quote | Post #2558880 (1)
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Jul 24, 2021 6:31 AM CST
Please post a photo so we can see what you have and what you are seeing. How are you treating the spider mites?
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at wcreed@HorticulturalHelp.com
I now have a book available on indoor plant care

Jas11
Jul 24, 2021 7:36 AM CST
WillC said:Please post a photo so we can see what you have and what you are seeing. How are you treating the spider mites?


Well, I tried EVERYTHING to get rid of the spider mites including an oil based insectcide. I already had to treat my smaller Calathea White Star, which was my first Calathea. The last method I tried was the "plant in a moist clear pastic bag"-method which was effective but my plant didn't like it and eventually I had to trim all leaves expect 2. It since regrew and is perfectly fine.
However, since the leaves on this plant are already damaged I don't really want to keep them anyway and would cut all of them off immediately if I knew the new shoots wouldn't be affected. (Posted a picture of the shoots above)

(Also; here's a pic of my very sad plant:)

Thumb of 2021-07-24/Jas11/ac498d

[Last edited by Jas11 - Jul 24, 2021 7:36 AM (+)]
Give a thumbs up | Quote | Post #2559751 (3)
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Jul 24, 2021 8:57 AM CST
It looks pretty good in the photo even if not perfect. How dry do you let the soil get before you water?
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at wcreed@HorticulturalHelp.com
I now have a book available on indoor plant care

Jas11
Jul 24, 2021 9:10 AM CST
WillC said:It looks pretty good in the photo even if not perfect. How dry do you let the soil get before you water?


I just water it once a week. I bought it back in march and after a few week I knew what amount of water it approximately needs. However, I decreased the amount of water a little since the plant decreased a lot in size and doesn't need as much water as before. With my Calatheas I try to not let the soil dry up as much as with other plants.
[Last edited by Jas11 - Jul 24, 2021 9:11 AM (+)]
Give a thumbs up | Quote | Post #2559860 (5)
Name: Will Creed
NYC
Prof. plant consultant & educator
Image
WillC
Jul 25, 2021 10:30 AM CST
How deep into the soil do you let the soil get dry before you water?

Do you see water run through the drain holes after you water?

Did you decrease the frequency of watering or the amount of water you give it?
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at wcreed@HorticulturalHelp.com
I now have a book available on indoor plant care

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