P. sanderianum rot issue

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kc6847

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Joined
Dec 7, 2022
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Location
California, USA
Hi everyone,

I'm encountering some rot on the basal leaves of a new growth on a recently acquired P. sanderianum that recently popped up somewhat simultaneously with our rains outside in Los Angeles. I already removed one small leaf at the base that was mostly rotted, removed clear watery tissue on the base of the second leaf, and dusted with cinnamon. Temperature lows average 65 F, ~50% humidity, moderate light, and watering once a week in a medium bark and perlite mixture from the original nursery. The roots in the top layer of media feel to be mostly healthy but no active growth tips. Would this be from water contact, low temperatures, or a combination of both? I'm a bit hesitant to reduce watering frequency since I don't want to dry out the plant further and risk dehydration but I also don't want the rot to spread further than it already has.
 

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