New Grower Ph Question

[1guy1plant]

I am going to be in home depot today. My soil ph has been around 7.5 my entire grow. I have some advanced nutrients ph down that will be here Wednesday. I am on day 25 of my grow. Is there anything I should add to the soil today that will help. I know dolomite lime will help but I am looking for a quicker fix. I will add some to my soil mix for the next grow. Should I just leave it alone and hope the ph down helps. I have been watering at about 6ph with nutes and vinegar and my run off is 6.7 ph.

 

[namvet25]

Just leave it until you get your ph down.Your runoff is ok but try and keep it as close as you can to6.5

 

[justintrudeau]

6.7 isnt that high bro..u should be ok with the vinegar until u get the ph down. I usally keep my ph around 6.5 with no ph issues! I actually know a vetran grower that likes his ph at 6.7!

 

[DABaracuss]

HI welcome..can I ask if you are getting runoff? you may want to let it dry out a lil then flush with plain water..most of us here feed on every 2nd watering.Good luck..How does the plant look? any pics?

 

[bobwobbly]

I had the same problem, couldn't get my soil Ph down, the Ph down solution didn't seem to effect the soil Ph, the only thing I found that worked was Aluminium Sulphate, it's nasty stuff though so go easy with it. Muddy is the man to speak to, he walked me through my problems, here's a link if it's any good to you https://www.autoflower.org/f90/high-ph-wont-move-37113.html

Good luck dude :Sharing One:

 

[1guy1plant]

Thanks. I am worried about doing anything drastic in the middle of this grow because they seem to be doing ok. I just don't want any problems during the 2nd half. I am just giving nutes every other watering but I add a little cal/mag at each watering bc I am growing with LEDs.

 

[Muddy]

I don't think you're far enough off to warrant adding any aluminum sulfate. 6.7 is just a bit high. Lower the pH of your feeds a bit more, to around 5.8 and your should be fine. Additional dolomite is notneeded. Lime raises the pH and yours is already too high. In fact, your soil mix may have had too much lime which is contributing to the high pH.

 

[turtle360]

Isn't the most important thing to feed/water with water with a proper ph, 6.5 or so for soil grows?

If soil ph is 7.7 and you water at 5.5 this works? I would doubt this is a prescription for a healthy grow.


As a separate but related issue, I'm still waiting for anyone to report that a soil ph which is skewed away from normal as indicated by measuring run off can be confirmed measuring the soil ph with a soil probe like the Accurate 8. How can we collect data points? Specifically if I water at 6.6 and get run off at 5.4 this is supposed to suggest a soil ph of 4.2. My Accurate 8 reads 6.2. Math majors and scientific types chime in? Time to get a new Accurate 8? Plants don't totally die in 4.2 soil?

 

[Duckster]

Do you measure the soil pH with accurate 8 before or after you add the 6.6 water?

 

[1guy1plant]

I am not sure what accurate 8 is? I have a soil master ph tester. It is cheap. I bought it at home depot but it seems to be accurate.