sirhans
Newly Registered
Posts: 1
Joined: Wed Feb 28, 2018 12:33 am

Iron supply for Hydroponic Leafy Greens

Hi,
I'm looking to grow leafy greens like butterhead and romaine lettuce, but I havent figured out the right Fe ratio yet.
The fertilizer I currently favor has
Iron (Fe)* 55 ppm Manganese (Mn)* 11 ppm
how much would you recommend for lettuce growing?
greetings,
hans

JONA
Greener Thumb
Posts: 812
Joined: Fri Jul 25, 2014 7:11 am
Location: Sussex. England

The balance of these two is important as you indicate sirhans. Those levels look ok, keeping the magnanese down to a level that will not affect iron take up.
Don’t forget ph levels though. The nearer to 7 the poorer the uptake by the Roots of iron.
In trials I’ve looked at iron 50 ppm with added manganese at around 6 the final dry weight was improved.



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