Re: Any idea whats causing this?
I do agree with Tytaylor about the water. But I'm more worried about the gypsum & sulfur added to the fertilizer. These are two items that should not just be arbitrarily added to the soil without a specific need to lower the Ph. ... Gypsum depending on it source might be highly acidic itself. Cheap gypsum as a byproduct of admissions smoke/flue scrubbing contains sulfuric acid. These were not added as minor elements as the manufacturer indicated the gypsum was to break up heavy dense soils.
Cut back on the water; change fertilizers but withhold any for the present; Check the soil Ph and tell us what it is.
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