Catts Losing Leaves

[jmrathbun]

Some of my Catts have several leaves yellowing and falling off since I brought them indoors. Is this specific or is there a list of conditions to consider?

[estación seca]

The list is very long. The worst possibility would be dead roots from being wet and cold. Especially in the winter, Catts need to dry between waterings.

Another possibility is too dry and cold. They will drop their leaves if they get too cold.

Another possibility is low humidity.

Without more information it's not possible to say much more.

[Becky15349]

The above answer is perfect - its so hard to say what could be causing it, but it sounds like a root issue. How are you watering? Were they wet when you brought them in? Any pests? What the sun exposure? How old are they? A little more information would really help!

[jmrathbun]

Sorry for delay. I expected to be notified of replies but that didn't happen. And thanks for trying to assist. Here are some possibly relevant details regarding loss of condition in some of my Catts following autumn transition to indoor growing:

AFFECTED with leaf drop in November:

Blc. Chia Lin ‘P.C.T.’ FCC/OSROC

Blc. Waianae King 'Orchidheights' HCC/AOS x Lc. Trick or Treat 'Orange Rock'

Blc. Campobello 'Mendenhall' HCC/AOS

C. New Dawning 'Lines – 789


UNAFFECTED in January:

Blc. Ronald Hausermann 'Carl' AM/AOS

Blc. Sea Swirl 'Whirlpool' HCC/AOS

Lc. Nancie Thomas x Lc. Persepolis 'Splendor' AM/AOS

Slc. Tokyo Life 'SVO' HCC/AOS x Pot. Martha Clarke 'My Beauty'


All potted in medium Orchiata 6" pots with river rock in bottom.


Summer conditions May through September:

On shaded porch, they get AM sun until 9 or 10, then medium shade.
Highs in the 80s and lows in the 60s.
Humidity typically 50 - 70 % daytime and 70 - 90 % at night.
Rainwater runs off deck above.
Watered twice a week unless rained on, using RO water of neutral pH.
Fertilizer: K-Lite 12-1-1-10-3 1/4 tsp per gal.
Also SuperThrive 1/4 tsp per gal.


End of summer:

Drenched with Organocide (Sesame oil in fish oil emulsion)


Winter conditions beginning early October:

On indoor bench, enclosed.
Around 4500 foot-candles near tops at 3200 K.
Temps low 70s in October declining in January to low 60s.
Humidity above 60% days up to 80% at night.
Watering every 3rd day using RO water of neutral pH.
Same fertilizer and hormone mix.
BTI spores added to water.
No-Pest Strip and flypaper in use show minimal infestation with fungus gnats.

[silken]

Media and temps sound fine, unless media is rotten. However I have never owned a Catt that needed water every 3 days, unless mounted. Maybe your conditions are extremely dry, but it doesn't sound like it. Catt's need to drain very well and then dry out even down in the bottom and centre of media or you will likely have root rot. Do you know how the roots are? Since they are all in 6" pots are they all good sized plants of similar size? They are usually potted in pot sizes that match their root ball, leaving only a bit of extra space for a couple years of growth. Otherwise they stay wet too long and rot roots. Some pics would be really helpful. The fungus gnats can be an indication of moist conditions also.

[estación seca]

I have tiny seedlings in 5cm pots that are going more than 3 days between waterings, and my day temperatures may be 30C. I agree they are likely staying too wet. I would expect a watering interval at those temperatures of 10-20 days.

[No-Pro-mwa]

My catt's in 4 inch pots have to be watered that often. I know it seems like to much but I was way under watering them especially after a re-pot. I was even drilling holes in them and stopped.