Changing the NPK

Im currently useing 5-1-1 on my month old plants. When should I change the numbers? And how can I raise the PH?

Aim for pH 6-7 though out the plants life. Young plants and nutrients, little plants require little nutrients. The flowering stage, either natural or photo period enduced is time to change NPK. Go to low N with higher P and K, during this time.

Cubalibre said:

Im currently useing 5-1-1 on my month old plants. When should I change the numbers? And how can I raise the PH?

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Change the PK(up) just before flowering and buy some Ph UP from your Hydro shop.

lennyo said:

Change the PK(up) just before flowering and buy some Ph UP from your Hydro shop.

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You don't want to raise your pH unless below 5.5, marijuana grows best with a slightly lower Ph.

http://www.a1b2c3.com/drugs/mjgrow9f.htm

Soil should be around 6.5pH
Hydro should be around 5.8pH

You can change your NPK ratio with the Dutch Nutrient Formula 6 pack

You can purchase pH up/pH down from Home depot for about $8.00 per half gallon.

GrowTech said:

Soil should be around 6.5pH
Hydro should be around 5.8pH

You can change your NPK ratio with the Dutch Nutrient Formula 6 pack

You can purchase pH up/pH down from Home depot for about $8.00 per half gallon.

Click to expand...

Thank you, for the correction, I was reading that on the link I posted. My Bad