Advice for a first time grower

I'm a first time grower and started two plants that sprouted the week of July 14th and now that they're nearing the end of their cycle, I've noticed the leafs on one of the plants are all going brown and I can't tell if they're infected. I've used all Foxfarm products from the soil to the liquid plant food BIG BLOOM and Tiger Bloom for the past 3 or 4 weeks. I stopped fertilizing about a week ago thinking it was time to start flushing. Any thoughts?

its fine, ive seen many plants looking like that. i think its to do with phosporus build up but could be wrong

Right on, I appreciate it.

you might find this of some help

I think it looks it ok unless those brown leaves are crispy. If they are crispy then you're overfeeding probably. Just give her water with a decent amount of runoff and she'll be fine. Dont flush.

Deff over feeding them. They’ll be okay though. But change your food to a better one fox farm always messed my plants up. General hydroponics flora series just the 3 base nutes have done good. And always feed till you chop. You’re just gonna cut off your nitrogen/veg base nute last 2 weeks