21-0-0??

sun622 · February 28, 2013

Had a customer today ask me for Ammonium Phosphate 21-0-0. I gave him some lawn fertilizer made by howard Johnson we sell. He wants to put it on his tomatoes. His wife told me he's been growing tomatoes for 40 years so "he knows what he's doing". Anybody ever use 21-0-0 on their tomatoes?? I never would.

Stvrob · February 28, 2013

Wouldn't ammonium phosphate be something like 20-20-0? Do you mean ammonium nitrate or ammonium sulfate

Redbaron · February 28, 2013

I never would either. Might give it a burst of growth in the spring though.

TomNJ · February 28, 2013

Depends how much he uses and his soil fertility. My garden soil in NJ tested very high in phosphorus and potassium, so I only needed to supplement nitrogen. I used high nitrogen lawn fertilizer (29-0-4) in small quantities to lightly boost the nitrogen when needed. I have also used blood meal (13-0-0) for the same purpose.

TomNJ

February 28, 2013	#1
sun622 Tomatovillian™ Join Date: Jun 2012 Location: Brownsville, Tx Posts: 1	21-0-0?? Had a customer today ask me for Ammonium Phosphate 21-0-0. I gave him some lawn fertilizer made by howard Johnson we sell. He wants to put it on his tomatoes. His wife told me he's been growing tomatoes for 40 years so "he knows what he's doing". Anybody ever use 21-0-0 on their tomatoes?? I never would.

February 28, 2013	#2
Stvrob Tomatovillian™ Join Date: Jan 2013 Location: Jacksonville, FL Posts: 1,413	Wouldn't ammonium phosphate be something like 20-20-0? Do you mean ammonium nitrate or ammonium sulfate Last edited by Stvrob; February 28, 2013 at 10:14 AM.

February 28, 2013	#3
Redbaron Tomatovillian™ Join Date: Sep 2012 Location: Oklahoma Posts: 4,488	I never would either. Might give it a burst of growth in the spring though. __________________ Scott AKA The Redbaron "Permaculture is a philosophy of working with, rather than against nature; of protracted & thoughtful observation rather than protracted & thoughtless labour; & of looking at plants & animals in all their functions, rather than treating any area as a single-product system." Bill Mollison co-founder of permaculture

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February 28, 2013	#4
TomNJ Tomatovillian™ Join Date: May 2009 Location: Floyd VA Posts: 771	Depends how much he uses and his soil fertility. My garden soil in NJ tested very high in phosphorus and potassium, so I only needed to supplement nitrogen. I used high nitrogen lawn fertilizer (29-0-4) in small quantities to lightly boost the nitrogen when needed. I have also used blood meal (13-0-0) for the same purpose. TomNJ