Truncheon use and PPM

by Scott
(Iowa, USA)

Bluelab Truncheon

Bluelab Truncheon

I just bought a Bluelabs truncheon to test my nutrients. I have gone online and found all sorts of suggestions for a good ppm range for the stuff. Can you tell me a good range to keep it in?

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Answer from Stella:

First mix up a fresh batch of your favorite nutrient solution, following the bottle directions carefully. Then measure the PPM or EC of this fresh solution using your new truncheon. Then try to stay close to that number in the future. Keep in mind this is not an exact number, and it will definitely vary as water evaporates and nutrients are used.

But here is a good general range for most plants:

ppm--- 1120-1680
EC--- 1.6-2.4

Danger zone/ too strong: OVER 2,000 PPM (OVER 2.8 EC)

And here is a large chart for specific vegetables EC-PH Chart

So what the heck is a truncheon, you ask? It is an electronic stick meter which helps you keep your nutrient solution the right strength. It is fairly expensive, but very nice to have for troubleshooting a full garden of adult plants that has suddenly gone south.

Read more about this, our favorite brand of truncheon, here:
Bluelab Truncheon Meter


Hope this helps!

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