BigD13
Well-Known Member
It’s not the pH of your water that’s important, it’s the alkalinity. Here’s what the guys at Pro-Mix have to say about it:
“The higher the alkalinity of the water, the more lime it contains and therefore, the more rapidly the water can cause the growing medium pH to rise. On the other hand, the pH of the water does not have any influence on the pH of the growing medium.”
Also, the type of fertilizer can have an effect on soil pH. Again from Pro-Mix:
“Ammonium and urea are acidic forms of nitrogen which cause growing medium pH to drop and nitrate is basic which causes growing medium pH to rise.“
If you haven’t seen it, here’s a good thread on whether you need to adjust nute pH.
“The higher the alkalinity of the water, the more lime it contains and therefore, the more rapidly the water can cause the growing medium pH to rise. On the other hand, the pH of the water does not have any influence on the pH of the growing medium.”
Water Alkalinity vs pH in your Growing Medium - What's the Difference? | PRO-MIX Greenhouse Growing
Water pH measures the amount of hydrogen (acid ions) in the water, whereas water alkalinity is a measure of the carbonate and bicarbonate levels in water.
www.pthorticulture.com
Also, the type of fertilizer can have an effect on soil pH. Again from Pro-Mix:
“Ammonium and urea are acidic forms of nitrogen which cause growing medium pH to drop and nitrate is basic which causes growing medium pH to rise.“
How to Maintain the Proper pH of a Growing Medium | PRO-MIX Greenhouse Growing
When asked “How do you maintain the proper pH of a growing medium?”, often the answer is to adjust the water pH to achieve a growing medium pH in the ideal range of 5.6-6.2. This is simply not true.
www.pthorticulture.com
If you haven’t seen it, here’s a good thread on whether you need to adjust nute pH.
Do we need to pH adjust our nutrient solutions?
Greetings all! I recently had a running email conversation with the "Grower Services & Product Development Director" at ProMix (aka Premier Tech). I began the conversation by posting a question on their website, asking if I should be treating ProMix HP as soil or soil-less when mixing...
www.420magazine.com