Ask a Question forum: Calathea(?) Yellow spots.

Views: 957, Replies: 1 » Jump to the end
Aug 14, 2017 2:08 AM CST

Yellow spots on my Calathea (I think it's a calathea?!) I can't seem to find other examples of.
- Flat is generally around 22-25 Celsius
- Recently got a watering spike to try and make sure it gets enough water
- moved it away from sunlight
- London water so quite hard if that makes a difference
- Not that great at fertilizing but do it about once a month.
- Also try and spray it to try and keep humidity up (I know not ideal, flat is v dry).

Any help is really appreciated. :D


Thumb of 2017-08-14/Heathershouseplants/eb80f8

Thumb of 2017-08-14/Heathershouseplants/24a226

Name: Will Creed
Professional indoor plant consultan
Aug 14, 2017 2:49 PM CST
It is hard to associate the brown spots with any one cause. I also see a lot of yellowish discoloration over the surface of the leaves. That could be a result of misting with hard water as the minerals in the water dry on the leaves. If so, it can be wiped clean. Low humidity is not a problem with Calathea, so I don't recommend spraying it with hard water.

It is hard to tell from the photos, but the leaf surface discoloration could also be spider mite damage. Check carefully on the undersides of the leaves for spider mites.

The temperature of your flat is not a problem. Calatheas prefer lots of very bright but indirect sun. If it is not over-potted, it should be watered as soon as the top surface of the soil is dry.I don't recommend water spikes because they keep the soil too wet in many instances. If you fertilize, do it only at half strength when the plant is healthy and growing vigorously; it is not medicine.
Will Creed
Horticultural Help, NYC
I now have a book available on indoor plant care

« Homepage
« Back to the top
« Forums List
« Ask a Question forum
Only the members of the Members group may reply to this thread.

Member Login:



[ Join now ]

Today's site banner is by ge1836 and is called "Blanket Flower Amber Wheels"