Ph problems

SoMEgrowNewb33

Well-Known Member

• May 12, 2015

• #1

Hey guys I have a pH question. I have a plant with ph lockout. I'm in pro mix hp soilless mix. So I ph like hydro. I'm flushing a plant that's in flower with water PHed @6.0 with runoff @ 6.6. I want runoff at 6.0 and I have put almost 15 gallons thru with no change. Should I ph water lower to compensate?

 

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DirtyMcCurdy

Well-Known Member

• May 12, 2015

• #2

Not sure about your soil/soilless, does it contain dolomite or dolomitic lime? If it does it acts like a ph buffer. If your runoff is at 6.6 I would be happy with that in soil/soilless mix. Try flushing or feeding with 5.0 or 5.5 pH and see if that will get it lower. How does that plant look?

 

SoMEgrowNewb33

Well-Known Member

• May 12, 2015

• #3

Not that great right now, it has yellowing throughout it that's why I think that's too high

 

SoMEgrowNewb33

Well-Known Member

• May 12, 2015

• #4

I'll post pics

 

Kind Sir

Well-Known Member

• May 12, 2015

• #5

Picture please

 

DirtyMcCurdy

Well-Known Member

• May 12, 2015

• #6

If its yellowing throughout the whole plant it could be too high and locking out iron. Again I'm not familiar with promix or anything like it, I use coco. How do you pH your nutes/water? What brand of pH up is it? Maybe pH and let it sit for a day, check and adjust before using.

 

SoMEgrowNewb33

Well-Known Member

• May 12, 2015

• #7

added pics

 

rob333

Well-Known Member

• May 12, 2015

• #8

SoMEgrowNewb33 said:

Hey guys I have a pH question. I have a plant with ph lockout. I'm in pro mix hp soilless mix. So I ph like hydro. I'm flushing a plant that's in flower with water PHed @6.0 with runoff @ 6.6. I want runoff at 6.0 and I have put almost 15 gallons thru with no change. Should I ph water lower to compensate?

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first things first YOU DONT GET LOCK OUT IN SOIL soil will always buffer a ph no matter what unless u are chucking a ph at 2-3 thru it that will fuck ur plants up hard

 

rob333

Well-Known Member

• May 12, 2015

• #9

rob333 said:

first things first YOU DONT GET LOCK OUT IN SOIL soil will always buffer a ph no matter what unless u are chucking a ph at 2-3 thru it that will fuck ur plants up hard

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my outdoors sit on a ph of 9 all the time with no issues do use really think im gunna be running around doing ph to about 200ltrs of water ??

 

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rob333

Well-Known Member

• May 12, 2015

• #10

SoMEgrowNewb33 said:

Hey guys I have a pH question. I have a plant with ph lockout. I'm in pro mix hp soilless mix. So I ph like hydro. I'm flushing a plant that's in flower with water PHed @6.0 with runoff @ 6.6. I want runoff at 6.0 and I have put almost 15 gallons thru with no change. Should I ph water lower to compensate?

Click to expand...

because it is budding it is useing up all the nutes that it can from the leaves as it is in ur plant to fix that u can add some veg nutes to ur flower nutes and water or just bump your mill rate up by 1

 

rob333

Well-Known Member

• May 12, 2015

• #11

this bout 2 days be4 i pulled with about a 2 week flush

 

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DirtyMcCurdy

Well-Known Member

• May 13, 2015

• #12

SoMEgrowNewb33 said:

added pics

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Well I can rule out iron deficiency. You might just need to add a little more nitrogen to your nutes. Mix in a little veg nutes or calcium nitrate. A high pH wouldn't lock out Nitrogen but it does look like a nitrogen issue.

 

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87Strange

Member

• May 13, 2015

• #13

I was also thinking nitrogen

 

ugorg

Well-Known Member

• May 13, 2015

• #14

id say nitrogen is low

 

SoMEgrowNewb33

Well-Known Member

• May 13, 2015

• #15

Thanks all for in put. I flushed about 12 gals of water PHed at 6.0 with no change to the run off at 6.6 then I flushed 3-4 gals more PHed at 5.5, also with no change to the 6.6 runoff (in fact, it actually went up to 6.8???) so then I gave up on flushing and fed a good flower feeding with a little extra nitrogen. We will see what happens...

 

O

old shol4evr

Well-Known Member

• May 13, 2015

• #16

if you are using promix ,you should be running 6.5 anyway ,feed that bitch and up the calimagic and it will pull around,i started out with it and gave me nothing but problems . i was always checking ph in and out ,ppm&ec in and out to i almost worrid my self to death,i finally started mixing ph feed and watched them to they went into jars.

 

S

sidewing

Well-Known Member

• May 13, 2015

• #17

yeah thats def nitrogen, they're just hungry. a lot of bloom nutrients are too low in nitrogen, and too high in p. high p will block out micronutrients as well as hinder nitrogen uptake.
didn't see you mention what nutrient regime you're giving your plants? also promix is not the same as hydro. ph of 6.5 is good. hydro needs a ph of 5.5-6.0, the sweet spot median being 5.8.

 

Dr.Pecker

Well-Known Member

• May 13, 2015

• #18

Most soils are prebuffered. For promix Just ph the water nutrient solution at 6.3 don't worry about the ph of the runoff. If your testing runoff check the ppms not ph. If you're having lockout your ppm of the runoff will be a lot higher that the solution you're putting in because the plant is not absorbing the nutrients.

 

Dr.Pecker

Well-Known Member

• May 13, 2015

• #19

This looks about five or six weeks in and normal to me

 

Dr.Pecker

Well-Known Member

• May 13, 2015

• #20

I wouldn't worry about a little bit of yellowing mid way through. You could try a little bit of nitrogen. What are you feeding it BTW?