Leaves changing colour in smaller containers than others. Thinking they ran out of nutrients in the growing soil. How close to harvest?

Looking at the hairs you look like your around 4-5 weeks so I’m guessing another 6 weeks . The yellowing from the bottom looks like nitrogen deficiency. I’ll hit it with a flush to make sure I’m not locking out my nutrients then right after the flush hit it with a feeding then let dry for a few days. Good luck to you

If there are red hairs on the flowers probably yes, if not wait. If super cold, then that is a different story. Some strains tolerate a 24 hour temp swing of >25°F, some don't. If its gonna freeze, get them indoors for the frost and then back out, or cover them. I wouldn't let a temporary weather pattern make a choice for you. The ones with a few yellow leaves look OK, but the ones that are more yellow all over, if you haven't feed them can you give them some compost tea? Like Boogie Brew.

It looks like your plant ran out of and being in a small container could be part of the reason. Its like you flushed the nutrients out of the soil. As far as harvest it looks like your about 3 weeks away. Hopefully I answered your question and remember Happy Growing and Free your mind one puff at a time.