Can not harvest bc nutrients wont go out of Autopots.

you will never be able to flush all the ferts out of the plant or the soil. best thing you can do is feed plain water only for last 2-4 weeks of flowering so you arent harvesting nutrient burned buds

Flushing your plants is not needed at harvest. That's what we call Bro Science.... There's been studies on flushing and the results say that plants with zero days of flushing have the smoothest smoke and best flavor.

So? What do you think they do outside? Fush the earth of all nutes in a 10' radius? LOL, that would be insane. Nutes in the substrate is not nutes in the plant. Nutes in the plant cannot be excreted. They can only be used. So flushing isn't doing shit for what's in the plant already. If it wasn't toxic, you really have no concenrns here. Looks like there's some combination of overfed and underfed, if not nute lockout. You needed to reduce concentration in the substrate long ago when the damage was accumulating. There's no fixing a toxicity in a short period of time. Merely keep giving water-only if it's being harvested soon. I would not stress it pouring gallons upon gallons through the soil. Get a little runoff but don't go overboard.

Possible solutions: Flushing: Since the harvest is approaching, flushing the plants is a good way to remove excess salt and prepare them for harvest. This involves watering the plants with plain water for several days before harvest. However, due to salt buildup on the surface, thorough flushing may be required. pH adjustment: If the pH of the water or growing medium is off, it can hinder nutrient uptake. Check the pH of the runoff water and adjust it if necessary. The ideal pH for coconut-based growing mediums typically ranges between 5.5 and 6.5. Nutrient addition: If flushing doesn't solve the problem, you may need to add a light dose of nutrients to the water reservoir. However, be cautious and avoid over-fertilizing, as this can worsen salt accumulation. Early harvest: If the salt buildup is severe and the plants are showing signs of stress, it may be necessary to harvest early. Even if the yield may be lower, it's better to harvest early than to risk the entire crop.

No need to flush. Plants look fine. Smoothness of smoke has a lot to do with the trimming, drying, and curing process. Not flushing. Auto pots are designed to have the salt build up be on top. If you want to reuse, scrape the top 2.5 to 5 cm out where the build up is. I have not used autopots, thinking about it, but that's what I've read about using them from very successful users. There is a guy called Autopotomus that uses them and does insane yeilds with it. Look him up if you have time. Either way, nice grow! Best of Luck! Happy Growing!

If you're wanting to flush the substrate you're gonna have to do it without the autopot. You can't really flush using a wicking or bottom feed system. I would just chop whenever they're ready and then thoroughly rinse the substrate later if the plan is to reuse it.