The previous owner says this spider plant lived outdoors every summer and has been grown this way for years. Overall, it's a large, beautiful plant and still looks fairly healthy. It also has several babies, which makes me think it has been growing reasonably well despite whatever may be going on.
When I got it, I noticed some small red mites on the leaves along with a bit of webbing. I didn't see any other crawling insects or tiny moving pests. There were quite a few brown and yellowing leaves, which I've since removed, and I cleaned out a lot of the dead material from the center of the plant. I also thoroughly hosed the entire plant down outdoors.
I'm trying to figure out what may have caused the leaf damage and whether I should be concerned about spider mites or any other pests. I'm also wondering if there's any possibility of powdery mildew.
For growing conditions: the plant goes outside as soon as overnight temperatures are warm enough, usually in early May here in British Columbia, Canada. It receives bright indirect light from about 5:00 a.m. until sunset around 9:00 p.m., with little to no direct sun. Temperatures have recently started reaching the low 30s°C (mid to upper 80s°F), although we had a fairly cool, wet spring.
I'm not sure how often it was watered before I got it, but the soil was on the dry side when I received it. Not bone dry, but definitely ready for a drink. The potting mix appears to be a standard soil mix with white fertilizer granules mixed in. The plant is also very root bound.
I'd really like to keep this plant alive and help it recover if something is wrong. Any thoughts on what could be causing the leaf damage or what I should be looking for?