Urea and ams.

With liquid you’re buying water and a little bit of N.

Like a parent would tell a kid, you’ve got water at home

 

AMS is my vote. Urea second.

 

This one:

Amazon.com : Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK - 1 Gallon Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care - Slow Release High Nitrogen Turf Builder : Patio, Lawn & Garden

Amazon.com : Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK - 1 Gallon Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care - Slow Release High Nitrogen Turf Builder : Patio, Lawn & Garden

www.amazon.com

only 64 dollars a gallon

 

No mention of content at amazon nor the petratools website. most likely urea/ams mix with iron.

There is approximately 2.8 lbs of N in the gallon. So $23.21 per pound. Plus you get some iron.

AMS 50lb bag. ($18.60) has 10.5 lbs of N. So $1.77 per pound. No iron

Urea 50 lb bag (~17.00) has 23 Lbs of N $0.74 per pound. No iron No sulfate.

 

If you need sulfur or have a high pH use AMS otherwise Urea is the best bang for the buck.

 

So should I just avoid the liquid and get urea granules? I thought liquid would be the quickest way to push growth. If granular is just as effective I’ll do that.

 

AMS and Urea can both be "melted down" aka mixed with water to create your own spray solution. So you are basically able to create your own spray solution to the level you want/need for a fraction of the cost of a pre mixed bottle.

 

You should get as good if not better green up with AMS. Urea's advantage is that it's cheaper and has less chance of leaf tip burn but yes, you can mix them together if you wish. It's one of those things you have to play around with and see what works best for you and your lawn.

 

Thanks, I'll try 5.5 oz of Urea and 4 oz of AMS for .2 lb total, plus the negligable amount from Feature.
Should I be worried about losing Urea to the atmosphere if I apply around 7:45 PM and water in 10 hours later?

 

If you're spraying urea, most uptake occurs within the first few hours. Therefore, applying in the evening will maximize the amount of time that it stays on the grass blades since it will dry off more slowly. If you can do it when it's humid out, then it's even better due to prolonged drying times. I have never been able to find anything that says a foliar application of urea needs to be watered in afterward, so whether you really need to do that is unclear.

 

Why liquid? Why not slow release Milorganite granules?

 

To get the same amount of nitrogen that you could spray on would require you to pay 10 times as much. Actually, I haven't done the math, but I imagine it would be much more than 10 times as much.