[Nifty_PoT]

Originally Posted by Coconutz

nutrient lockout/unavailability during a flush? nonsense
you are flushing so that the plant doesnt try to uptake anymore nutes from the medium.
Why would you want to make it easy for it to uptake nutes?
I actually dont even check ph after I cut micro, all the way til flush.
It should be somewhere around 6 after I mix a little bit of bloom, but I dont care. My coco will buffer it quite well

The plant will always be taking nutes from the medium regardless of ph, the correct ph will just make things easier for the plant to work though.(in the medium and internally within plant)

A plant has an internal ph to maintain, if it stays at 5.8-6 the plant will be able to eat the nutrients stored in the leaves much more effectively. You should be lowering you ppm dramatically in the last 10 days to achieve this , by not checking the ph it can be 7-8 (who knows ) but this will definitely hinder the internal plant ph and cause it to not be able to eat itself to the best of its ability !

[Coconutz]

The plant PH is much higher than the rootzone.
Is there evidence or some research you can show us?
How do we know that matching the water to the actual internal plant ph wouldnt be better for flushing than phing it to the ideal ph range for the medium?

[Nifty_PoT]

Hey coconutz

The plants ph is controlled by the medium's ph.. so in order to maintain an optimal internal ph you have to have a medium with optimal ph , it seem logical to me.

*edit , also the plants internal ph fluctuates because of environmental factors , so ph'ing yor flush water to the plants ph is an entire new experiment on its own ;D

[nachoconqueso]

I always thought that plant cells maintained their own ph levels. Plants have to make ATP and depend on ph gradients for the movement of H+ across the membrane. The movement of those protons powers ATPases which produce ATP. You'd know if your plant couldn't produce ATP anymore because it would instantly die. I say yay for plants having internal ph levels different than medium.

[Nifty_PoT]

Originally Posted by nachoconqueso

I always thought that plant cells maintained their own ph levels. Plants have to make ATP and depend on ph gradients for the movement of H+ across the membrane. The movement of those protons powers ATPases which produce ATP. You'd know if your plant couldn't produce ATP anymore because it would instantly die. I say yay for plants having internal ph levels different than medium.

Hi nachoconqueso

Please dont misunderstand my posts.
Yes plants DO maintain their internal ph via environmental/external factors. We dont actually know (or want to know) what the internal ph is as it would be pretty useless , as it fluctuates up and down throughout the day/night. The only ph im talkin about that should be cotrolled is medium's which in turn regulates the plants internal ph, so nutrients stored can be used most effectively .

I will add to this that i have done both ways, and its hard to notice a difference , but i have noticed plants 'fade" differently if you control ph to the end. This is why i think it is possible to create a lockout of nutrients in the flush period if not maintaining the ph , especially if you flush longer, like 2 weeks ..

just my

[Slazz]

No, doesn't matter. Like other's said, why would it be?

[Growhoho]

I keep it @ 6.0 pH for my two week flush. I use Hygrozyme and sledgehammer to start the flush. Straight 6.0 RO after that until chop.

[Easy7]

If for some reason your water is highly acidic, then it matters. Super low ph can burn the hell out of plants. A slightly alkaline won't matter as much. Cannabis tolerates ph up to 8 just fine. Doesn't grow as rapidly with a ph of 8 so checking ph to get slightly acidic is a good idea. A flush should be 21 days for chem grows, as your still packing on weight you want nutrients to transport well.

[logistixz]

If you have been maintaining proper ph during the entire cycle and choose to use straight RO water during the last two weeks, wouldn't it be fine to not ph considering RO water takes to the medium's ph fairly quickly? I've found it pretty tough to hold a consistent ph with 0ppm water.

[Baloni]

Why stress plants with wrong pH?