Hi everyone,

I've hunted around the web for an answer but have yet to see this specific predicament listed so I'd thought I'd give it a shot here!

My orange tree has been doing well the past couple of months; it's a year old. I hadn't watered it for a week and a half or so but it was still a strong green and leaves felt smooth. The temperature "dropped" to the 60s a few days ago (from about 80s) while I had my window opened where I've always kept my tree on the sill, otherwise it was still very sunny and tree stayed the same.

However now the leaf tips have dried out and the green is not as strong as it once was. I moved it away from the sill wondering if it was sun damage (but again the tree has been doing fine for weeks on that sill) or if it was cold damage (but high 60s doesn't seem too cold?). I also went ahead and watered it. Doesn't seem to be doing any better, instead more leaves are acting scorched. I was looking around for leaf curl causes but most cite overwatering (which I hadn't done in a while and it had been doing fine) or pests (but upon leaf inspection I haven't found anything). Also wondered if it was a nutrient deficiency, however none of them seem to lead to this drying out. What confuses me most is how it seems to be concentrated at the tips, the other half of the leaf is doing fine.

Also attached a picture of the stem. I cannot remember if it was originally green so any insight as to whether the stem has also dried out would be appreciated!

Lastly I attached a picture of another green plant for reference to see how light the leaves have gotten. They were originally much closer to the other green.

Any help as to what could be causing this would be greatly appreciated!

Thanks!