Need help for paph. leaf color

[sweetkitten]

Hi, I got this paph saint swithin last month. Today, the bottom leaf shows some kind of orange color. I knew bottom leaf turn yellow is normal, but not expecting to see this color. It is a mid-size paph seedling, leaf span is about 10 inches. It is in its original pot, I water it every 2-3 days depends on weather. Most time, the top soil is dry after 2 days. Upon touching the leaves, I don't feel softness.Please let me know if there is any problem? If yes, what kind of treatment I need to proceed.
Thanks in advance for any advices.

[estación seca]

Any chance it got too close to a cold window?

[sweetkitten]

Yes, it sits on my window sill. It is around 30F outside, but my apartment is pretty warm over 70F most time. Window is closed, but I am sure there alway some kind of breeze gets in.

---------- Post added at 04:54 PM ---------- Previous post was at 04:52 PM ----------

Originally Posted by estación seca

Any chance it got too close to a cold window?

Yes, it sits on my window sill. It is around 30F outside, but my apartment is pretty warm over 70F most time. Window is closed, but I am sure there alway some kind of breeze gets in.