Can I use lime diluted in water to raise ph?

Hi I’m having a hard time managing my plant’s ph… it’s pretty acidic at the moment… I’m flushing the plant as we speak but runoff is consistently high and the soil remains stuck around 5 ph… I’m thinking of diluting lime into water and drenching with that to resolve the issue… what do you think?

Dolomite lime top-dressed in to the top inch of soil and watered in is your best bet. You don’t want to shock the plant so got to ease into it a bit.

Are you confident your PH meter is reading accurately?


Reasonably confident… it’s a $30 metre designed for testing ph in compost heaps so I think it should be reasonably ok… might be worth investing in something a bit more reliable

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You must have one of the probes you stick in the soil I have never used one, I would suggest look at apera or blue lab to get you a good pH meter. That would be one of your best troubleshooting tools.

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When did you calibrate it last? If it is a soil probe type I would not rely on it (unless it’s a Bluelab).


Umm never? I bought it from Bunnings for $30 :grimacing: just ordered a new one from Amazon that looks ok

Are there visible issues with the plant?

Saturated soil will usually read low using a soil PH probe.

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Many questions
How old?
What soil?
What feed?
Water being used? Tap RO well rain?
Ph of water?
Lighting type and duration?

Initially looks like a phosphorus issue to me from not having enough available in soil and or a soil PH issue

Many times a good flush will help things

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COPY/PASTE the below list into your forum post.

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.

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 :slight_smile: