2

I am quite new to hydroponics so forgive my ignorance :)

I am planning to make a simple DWC set up (for tomatoes) and was wondering if I could use a water soluble fertilizer (20-20-20 with Mg Fe Cu etc.) as the nutrient solution since (according to the label) it can provide NPK with other macro and micro nutrients for plants that grow in soil-less environment or should I only use nutrient solutions made especially for hydroponics? How different are they?

Thank you!

  • Look up magnesium phosphate. It is virtually insoluble. Don't know how the hydroponics for deal with this, but I suspect pulse feeding. – Wayfaring Stranger Jan 22 at 1:56
  • @WayfaringStranger Magnesium sulfate (epsom salt) is common for hydroponics. – user1850479 Jan 22 at 3:42
  • Yes, I know. It's the Mg plus phosphate That's missing from most soluble fertilizers. The problem is tractable, you just have to think it through some. – Wayfaring Stranger Jan 22 at 4:42
2

I am planning to make a simple DWC set up (for tomatoes) and was wondering if I could use a water soluble fertilizer (20-20-20 with Mg Fe Cu etc.)

It depends what is in that "etc". If all 13 required elements are present, then you could probably use that fertilizer. However, if it isn't made for hydroponics, it probably won't have them, since in soil growing you get trace elements from the soil.

New contributor
user1850479 is a new contributor to this site. Take care in asking for clarification, commenting, and answering. Check out our Code of Conduct.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.