Ask a Question forum: Dying Ctenanthe

Views: 3650, Replies: 5 » Jump to the end
South Australia
SarahNeedsHelp
Apr 18, 2018 10:22 PM CST
I am desperately trying to care for the ctenanthe I have at my office but he is suffering and I cannot figure out why. I have a calathea in the same room who is thriving. The plant is not in any direct sunlight, he is not blasted by air-conditioning, I water only when the soil is almost dried out and allow all excess water to drain when I do. He had a dose of fertiliser and seasol a few weeks ago which looked like it helped a little, but the leaves are dull, they have lost the colour on the underside, there are yellowish spots in the leaves and I haven't seen any new growth for some time - I adore this plant but I have no idea what it wants!!
Thumb of 2018-04-19/SarahNeedsHelp/952dd8


Thumb of 2018-04-19/SarahNeedsHelp/b4237e

Name: Sue Taylor
Northumberland, UK
Charter ATP Member Bulbs Bookworm Amaryllis Houseplants Annuals
Garden Photography Lover of wildlife (Black bear badge) Foliage Fan Birds I was one of the first 300 contributors to the plant database! Frogs and Toads
Image
kniphofia
Apr 18, 2018 10:34 PM CST
These are very difficult to keep in my experience. Has it always been in such a large pot? Feeding a stressd plant isn't a good idea.

I'd say toss it and replace it with something else!
South Australia
SarahNeedsHelp
Apr 18, 2018 10:50 PM CST
I have several varieties of these plants at home and they all get on very well this one just seems to want to test me! I feed all my plants on a regular schedule - this specific plant has been in that pot for well over a year and has only started to show signs of stress in the last 1-2 months.

I'm too attached to give up on him just yet Sad
Name: Will Creed
NYC
Profess plant consultant & educator
Image
WillC
Apr 20, 2018 10:00 AM CST
I agree with Sue, although not necessarily about tossing it. A large pot is very difficult to water properly because the excess soil absorbs lots of water and retains it for a long time. I suspect that the roots of your plant have been slowly suffocating and the effects are now starting to show up. I don't recommend doing it, but if you were to unpot the plant, I think you would find a very small root system that is struggling to survive.

I do suggest that you remove all the loose soil on the surface that is not in direct contact with roots. This excess soil is keeping the soil in the root zone from drying out frequently enough. That excess loose soil is also misleading you as to the soil moisture around the roots. Once you remove the excess surface soil, you can then water as soon as the surface of the remaining soil is almost dry. Add just enough water so that it reaches that same level of dryness again in about a week. Experiment a bit to determine the right amount.

It does need protection from direct sun falling on its leaves, but it otherwise it should be as close to a bright window as possible. If it is more than 4 or 5 feet from a window, it is not getting enough light.

It needs just water and no other supplements.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care
South Australia
SarahNeedsHelp
Apr 23, 2018 7:32 AM CST
Thank you WillC! I decided to go down the drastic route and repotted into a much smaller pot. You were totally right, his root system was very small and the soil at the bottom of the big pot was still very damp. I would guess it never fully dried out. I think the plant is going to get worse before it gets better but there was no evidence of root rot and the smaller pot is going to make it much easier to control the moisture levels so I am hopeful in time he will make a full recovery! Fingers crossed anyway Crossing Fingers!
Name: Will Creed
NYC
Profess plant consultant & educator
Image
WillC
Apr 23, 2018 2:29 PM CST
I appreciate your courage in taking the more drastic route. If it works, the plant will be all the better going forward. Keep us posted.
Will Creed
Horticultural Help, NYC
www.HorticulturalHelp.com
Contact me directly at [email protected]
I now have a book available on indoor plant care

« Garden.org 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:

Username:

Password:

[ Join now ]

Today's site banner is by greenappleagnes and is called "Tulip River"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.