beenthere said:@admmad the fert I applied three weeks ago is 29/0/5 with 2% iron. May be I caught it in time? It's the same fertilizer I used last year, felt it really helped the foliage recover from July.
Seedfork said:"Chemical fertilizers containing ammonium or organic fertilizers with protein (amino acids) acidify neutral and alkaline soils. Ammonium is nitrogen and hydrogen (NH3-). As ammonium fertilizers create nitrate, they release free hydrogen atoms to create an acid soil."
https://www.ehow.com/info_8055...