Why PH adjust flushing water??

I understand PH is important for a plant to be able to uptake nutrients. When things are off one way or the other to much the roots can no longer absorb certain nutrients aka lockout.

I understand flushing is to remove nutes from soils (or in my hydro grow, the hydroton) and cause the plant to have to use up its stored reserves to give us a better tasting smoke. Now, other than the PH being so high or low that the roots are fried, why worry about the PH? So what if it is in a lock out range? We are trying to take food away from the plant so who cares if it can't absorb nutes? Any nutes still in the soil won't get absorbed and any nutes in the flood water in hydro are from rinsing and you don't want it absorbed back into the plants.

I guess I am just curious on why to maintain PH for all practical matters, waste water.

I pH adjust because during the flush, I run diluted mixes of organic teas, sweeteners and micro nutrients and I need those available for the plant. But I understand what you're saying.

Unless for some reason the water your using has a PH thats off the charts, I don't see a reason to adjust for flushing. I use a flood and drain hydro system. When I get ready to start flushing I drain and clean my reservoir, and when I fill it back up all the water goes thru the plants 1st , then drains down.When the res. is full I drain it again and fill it the same way ( running water thru plants ). Then I adjust my PH because my plants get this water for the next 3 days. Then I drain...fill...drain and fill again. This time around I add 10% nutes to water and my plants get this for 1 week. Then I repeat the drain and fill ( all water goes thru plants 1st, then to reservoir ) and run just water till harvest.( 3-7 days). Like I said B4, I dont see any reason to adjust PH for the last step unless your water is really off the chart. Sorry about the rambling on...I just got a chance to finally try some of my most resent yield , ( Barney's Farm LSD )...so I'm a little baked to say the least..lol. Everyones got their own opinions on flushing, and I'm just learning ( 3 "real" grows so far) , but i would at least check the water 1st and make sure it isn't too bad ( mine is 6.6-6.9 ) B4 using it to flush. Good luck

I grow in COCO and i personally have not flushed with PH water on this grow to remove built up salts or nute burn.
I did experience nute burn on one of my plants when i thought i would see how far i could push her and hit her with an EC1.8 feed instead of the regular 1.5 man what a mistake. BUT I DID NOT FLUSH due to doing some research on osmotic pressure in the root zone falling to sharply and causing physical plant problems. Instead i reduced my EC concentration down slowly. to bring it back to normal gently rather than aggressively like flushing with water.

I will however be performing 2 flushes prior to my harvest.
1) will have a CANNA FLUSH in it and i will do a 3x pot size flush
then allow some drying up time maybe 3days for the coco to dry then
2) flush with plain ph6 water again 3x pot size then allow to dry for 2 days and then harvest.

I will not be flushing for 2weeks prior to the harvest as i am beginning to lean towards the thinking of during this last 2 weeks you dont want the plant to starve when it actually needs food.

J

I was thinking the same, thats when I started using 10-20% of my normal nute strenght the last 2 weeks, with just water for 3 days...1 in begining and again the last 3 days. 2 weeks seems to long with just water.My bud has no nute taste, no sparking, and it burns great.

It's my understanding that your not only flushing the grow medium but your flushing the plant so I flush with different phs of water in order to flush out the different nutrients that get absorbed at those levels I'm no botanist and it's just a theory but my smoke is always smooth with a nice white ash. Any other people tried this??

I didn't flush the last go around just to see the difference. I did do a proper long cure. Taste seemed the same, the smoke was not harsh, no sparking or twinkling during burning, and the effect was great, but the ashes were black. I am just growing Skunk #1 and it was nice and frosty. For some reason in my area, my friends seem to think that black ash is a sign of good bud. It may be due to the crap brick that this area gets. Other than that it is usually very dry in what is available. I still consider myself a newbie grower as the learning never ends...but its nice that it seems like my stuff is a hell of a lot better than the brick crap that is normally around. Some have offered me $20 a gram for my stuff. I take that as a sign of the crap that comes in from Mexico. Too bad I do not sell, but it feels great that others really enjoy what one worked so hard to finish.