I see a little amber in there. She's almost there. Personally I like to see 5-20% amber trichomes before harvesting. It depends how locked you want to be to the couch. More amber, more couch lock.
Keep it simple. Don't over complicate things. Make sure your soil is on point. Get you some good living soil with natural microbes, nematodes, and such, using just plain water with a little molasses and natural kelp. You'd be surprised.
LOL at citric acid in your eye. A garden comedian. Yes, more than the first thread is read when genuine about helping. In fact, a little natural citric acid may help more than any help you can give.
Could be leaf septoria or mites. To diagnos the issue get a good microscope or jewlerer loup to scope it out. Either way, if you like you can try a sample of our 100% all natural, all-in-one insecticide and fungicide here. https://doctorzymes.com/wizard. It will get rid of leaf septoria...
Get you a good microscope or jeweler loupe to see if there are any insects or pest problems. It there is,you can try a free sample of 100% all natural insecticide and fungicide here. https://doctorzymes.com/wizard. It will naturally prevent and eliminate pests, harmful insects, mildew, fungus...
Stop listening to what "they" say. K.I.S.S. your garden... Keep It Simple Smartie! No need to flush before flower unless you are pouring a bunch of junk into the soil. Get some good living soil, compost tea, and Eliminator for natural preventative maintenance to control pests. Do that and...