One of the main takeaways I had from my first week growing marijuana in Michigan was to make sure the pH of my water is correct.
To date, I have tested the water pH after I added the nutrients.
As I mentioned in the last post, initial pH testing showed the water was way too basic. 9.0, if not worse.
I thought at the time, this was due to the nutrients in the water.
Today I had the idea to pH test plain tap water.
Sure enough, water straight from the tap with no nutrients is very basic. I would say in the 8.0 – 8.5 range.
Good to know that at the very foundation, the pH of my water is off.
Every watering will need to be corrected to get the pH right.
I am using General Hydroponics pH Control Kit to measure and adjust pH.
Here are few things I have picked up from testing pH for marijuana growing:
- Just a couple drops of pH Down makes a big difference in the pH. Use pH down sparingly.
- Raising the pH with pH Up takes a bit more of the base solution.
- The pH Test Indicator Solution will probably run out well before the pH adjustment solutions.
- It takes a bit of practice and repeat testing to get the pH correct.
- Test water pH at every step. Tap water to get a baseline result, after adding nutrients and then again with any runoff after watering. There is a lot of pH testing in my future.
- Correct pH is far more important than I initially realized.
To summarize, what I have learned so far is to take pH more seriously!
This is something that is very controllable and I should have been more diligent from the start.
Make sure the pH is correct from the start and that is one less thing to consider if (when) problems occur.