View Full Version : Spraying liquid Fert 4-5-5 w/iron in 90 degree heat?

08-16-2009, 06:32 PM
Do you think spraying at this temp will cause any burn. I think the low N should make it OK. I'd be using 1gal/k of water. Any advice?

08-16-2009, 07:07 PM
It is not only the N you need to think about. Iron is something to be careful of in hot weather, especially if it is humid as well. There is a risk of creating black grass if the rate applied is at the upper limit of the range.

08-17-2009, 05:14 PM
spray it every day in tampa fl, 90+ every day down here. mixed with 2 other fertilizers not a problem on st augustine and at the high rate. does a great job but does not last long maybe 4-6 weeks