It doesn't say on the bottle. I have "Iron Enriched Plant Gro"
For the instructions it says "5 ml (approx. 1 capful) per 10 U.S. gal (37.8 L) provides the ideal amount (0.3 mg/L) of iron."
I did that on Friday which was the day I bought the fertilizer and plants.
For the instructions it says "5 ml (approx. 1 capful) per 10 U.S. gal (37.8 L) provides the ideal amount (0.3 mg/L) of iron."
I did that on Friday which was the day I bought the fertilizer and plants.