lowering ph in soil question

fruity86

Well-Known Member
Joined
Jul 18, 2009
Messages
1,152
Reaction score
215
hello guy's i need abit of help for a friend's soil grow, the PH of the soil is 7.2 it has been this for 3+week's now and it's lead to iron def, since im a hydro guy i dont realy now how to drop the soil PH, he has a bath full of water ready for when i get there if i PH the water to 6.0 then run 5x the pot side through each plant will this bring the soil PH down ?
thanks fruity
 

4u2sm0ke

Well-Known Member
Joined
Dec 1, 2007
Messages
17,344
Reaction score
13,504
adjusting the water to make the run off correct?...good luck..why are we checking the run off?...I make sure everything going into my soil is 6.5-7.0

and have never checked the run off....what are his plants telling you?..when ya get there can ya snap some picks?...I would like to see the PH issues...you can add lime to the soil...

take care and be safe
 

Jericho

Well-Known Member
Joined
Jan 4, 2010
Messages
1,392
Reaction score
143
Yeh, lime will bring down soil PH, How are you checking the soil PH?

I do the same a 4u2 and make sure my nutes going in are at 6.5ish. I dont check the run off.
If the soi is going to increase the solution going in then just lower the solution PH a little to correct it. This is not what i would do as i dont check my run off.
 

nouvellechef

Well-Known Member
Joined
Jun 8, 2009
Messages
3,175
Reaction score
381
Garden sulphur. Be careful. It can lead to more probs, when you start swinging the PH. Assuming hes not organic. I see all too often people running chem nutes that have all kinds of probs with PH. The buffers in them should keep it in check. As long as your PH'ing the water to 6.5 each and every time. GL
 

Locked

Music
Joined
Jan 24, 2009
Messages
16,527
Reaction score
3,742
Everything that goes intonmy soil has a ph of 6.5.... The result? No ph problems and no deficiencies...jmo
 

Wetdog

Old Droopy Dog
Joined
Jan 20, 2011
Messages
823
Reaction score
72
+1 on the how is he measuring the pH question?

Sounds like one of those useless prong type testers.

Unless you are in the ground, west of the rockies, most native soils and practically all bagged soils/mixes are on the acidic side.

Wet
 

trillions of atoms

Dare to dream...
Joined
Aug 31, 2006
Messages
4,703
Reaction score
3,492
Get a good digital PH meter if you dont have one, the others are near worthless along with the color tests...

The soils PH could be higher or lower than 6.5, that is why you check runoff...If he has no lime if the soil and the mix is peat based... his runnoff might be 6.8 or higher yet feeding with a solution of 6.5. The solution will maintain 6.5 but only until the other elements and the medium interact with it- causing drift. If feeding at 6.5 and the runnoff is at 6.5 you know the roots are in the zone.If feeding @ 6.5 and runoff is 8.0 you know there is a problem. Usually looking at the leaves will tell you there is a PH issue but that takeslearning and exp. Its OK to let the rootzone PH swing as it will when the plants feed. keeping it in the right zone without to much ph swing, while adjusting the feed solution back to the right level in small increments is whats important.

It doesnt matter what you do it matters what the person you are helping is doing and what they are working with to give the right advice.

Test runoff and adjust feed solution to compensate the PH in the rootzone, Use dolomite lime as a topdressing to help the drift and stay on top of the whats going in and out of the containers from now on. Next time you pot use just under a cup per gallon of DL in the soil or medium of choice to help the PH buffer itself later on in the grow....

Kudos!
 

nouvellechef

Well-Known Member
Joined
Jun 8, 2009
Messages
3,175
Reaction score
381
You mean 1tb per gal. Not cup? Actually about 1.6tb per gal will last 17 weeks.
 

Latest posts

Top