Tolumnia advice needed, hello from newbie in Delaware

[rabbitrun]

I apologize if this is a repeat. I wrote, attached pics, but cannot find them? I have a Tolumnia Purple Panter, which I purchased in Mar. Its in a 1.5" pot, but the roots are coming out the top and now encircling the pot. When I took the pics, I noticed some yellowing and spotting on some leaves, which may be because it got too cold the other night. Its now outside, under a dogwood tree, with the Phal.'s but it looks like it needs something. I fertilize it weekly with 1/4 strength orchid food, but should I repot it? I'm leaving for a month and I need to leave directions on watering it for the plant keeper who knows Phal's but not this nor the HWCR's but they're looking ok. One has been repotted (Scent of a Woman) and the other will hold till I get back. Any advice on repotting, needed or not, and light and temps are greatly appreciated. Hopefully I can find the pics as I know they're online, by the manage the attachments.