Do you intentionally allow ph to fluctuate?

[papa canna]

I hear stories about some people letting their ph fluctuate for optimum nutritional availability. Some people start higher and move lower and others do the opposite.

Most people will say to look at a chart and the answers should be obvious. But every nutrient availability chart differs from the last.

Should I let mine fluctuate? Or is it better just to pick a sweet spot? Im growing soilless btw.

 

[bryan oconner]

I do 6.5 here all the time soil . except hydro .
https://www.420magazine.com/forums/indoor-soil-cultivation/114733-ph-nutrient-uptake-charts.html

 

[Hydrotech364]

I intentionally decrease from time to time to ensure all of the nutrients are used, same in both hydro and mix.Although I wouldn't advise dropping your ph to 5.5 in your last week of flower.

 

[papa canna]

I intentionally decrease from time to time to ensure all of the nutrients are used, same in both hydro and mix.Although I wouldn't advise dropping your ph to 5.5 in your last week of flower.

In soilless I usually start at 6.0-6.1 and slowly over time into flower drop to about 5.7

 

[Dr. Who]

I do 6.5 here all the time soil . except hydro .
https://www.420magazine.com/forums/indoor-soil-cultivation/114733-ph-nutrient-uptake-charts.html

YOU might! But the soil is NOT!

When you water any true soil grow. The pH of the soil will drop by about a whole point! As the soil dries back out, it raise's in pH till it reach's it's "normal" pH value. So there is that natural pH "swing" that covers nutrient availability!

I might suggest you raise your in-going pH level in bloom to 6.7 for better availability of "bloom" nutrients or better put. Nutrients the plant uses more in bloom...

In soilless I usually start at 6.0-6.1 and slowly over time into flower drop to about 5.7

Your going the wrong way for blooming - You want slightly higher pH in blooming plants!

 

[bryan oconner]

dr who . great input . I will give it a try . in flower .

 

[papa canna]

YOU might! But the soil is NOT!

When you water any true soil grow. The pH of the soil will drop by about a whole point! As the soil dries back out, it raise's in pH till it reach's it's "normal" pH value. So there is that natural pH "swing" that covers nutrient availability!

I might suggest you raise your in-going pH level in bloom to 6.7 for better availability of "bloom" nutrients or better put. Nutrients the plant uses more in bloom...



Your going the wrong way for blooming - You want slightly higher pH in blooming plants!

So that makes n more widely available then?

 

[Dr. Who]

So that makes n more widely available then?

P - Ca - Mg in bloom