Help—first time grower!

Help—first time grower! I planted 2 feminized Indica seeds on 12/14/19 and I’ve been bringing them outside during the day (since planting) and inside at night (I live in Long Beach, CA). They have been thriving for the most part but I’ve recently noticed some spotting on the lower leaves; turning brown at the tips and a couple leaves are yellow. I’ve fed them fox farm nutrients weekly per recommendation on the bottle. Two nights ago I started putting them in a grow tent (inside) at night to ensure complete darkness but I didn’t realize the humidity would be a problem in the tent (90% humidity when zipped up in the tent) and I don’t have any more money to invest in a ventilation system. Can I leave them outside at night with a tarp over them so I don’t have to worry about the high humidity (temps have been dropping to the 40’s at night)? Also, what do you think the leaves are turning color from? Any advice would be appreciated! I’ve attached pics, where you see parts of leaves missing, that is where they were brown and I gently tore the “dead” part off...not sure if I should have or not?

Never start with recommended doses. Start at 1/4 work your way up.

Thanks! Any idea if it’ll be ok for me to leave them outside at night covered with a tarp if temps are in the 40’s?

I have but it depends on strain i heard if some guy who wraps the pot and leaves it off the ground

Ok I appreciate the feedback!