Ph reading help pls

growing in soil ffof and ffhp mix 50/50 , 7 weeks in (its been in flower for 2 weeks) my ph has been (for watering ) 6.5 to 6.7 . check the run off tonight after feeding and got runoff readings from all 3… 5.5, 6.0 , and 6.3 … is that a good range for run off?


The 5.5 is definitely low, are you having any issues or concerns.

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@Bulldognuts the plants seem to be doing fine. but I’m wondering if i should bring the ph up? and if so ? do i make my next water feeding a lil higher on ph? give me a sec and ill post a pic.

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plant on the left back is reading 5.5
left front 6.0
right 6.5

This is an old article but one I found useful.
I’m using Roots Original


Are the pictures in natural light? leaves are very light green/yellow looking. PH in soil should be somewhere between 6.3-6.8. General consensus seems to be that 6.5 is a sweet spot. I see very yellow leaves down low and progressing upwards?

I am looking at the nitrogen deficiency top left picture.


You have what appears to be a nitrogen deficiency. The best thing to do is fill out support ticket. Just copy and paste this list of questions, with answers. By doing this everyone will be able to help figure out what the best course of action would be.

Answer these simple questions the best you can.

If you do not know, or do not use something; Just say so; Or post

NA (non-applicable)

• What strain, Seed bank, or bag seed

• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF

• Vessels: Pots, Grow beds, Buckets, Troths

• PH of Water, Solution, runoff (if Applicable)

• PPM/TDS or EC of nutrient solution if applicable

• Indoor or Outdoor

• Light system

• Temps; Day, Night

• Humidity; Day, Night

• Ventilation system; Yes, No, Size

• AC, Humidifier, De-humidifier,

• Co2; Yes, No

Always try to upload a clear picture of any issues you may have to allow the community to assist you. Pictures taken under natural or white lighting are by far the best.

Add anything else you feel would help us give you a most informed answer should be included. Feel free to elaborate, but short and to the point questions and facts will help us help you in a more efficient manner.


I would start by verifying your pH meter in a fresh bottle of 7 solution and if it looks good, I would follow up by scratching a little bit of lime in on the plant with 5.3 PH runoff. The 6 an 6.3 personally I would let them ride. I’m also with @Bulldognuts with the yellowing leafs lack of nitrogen. Verify by checking your PPM on runoff. Good luck.


Thanks all for the feedback and suggestions. I did end up just feeding them with ph water last week because the week before I seen a few tips of the leaves getting burned so I was thinking too much Nutrients . I’m thinking lack of Nutrients now as pointed out from the color of the leaves. So I feed them last night with a mix of ff trio and some cal mag. And will keep an eye on it

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5.5 is near perfect. Do some research and you’ll see.