Miracid, which is 30% urea nitrogen, calls for 1 TB/gallon, so 2 TSP of 45% per gallon would be the same concentration.

You can also scatter up to 1 TB per square yard and promptly water. I've read advice to farmers that a rain of 1/2 inch will wash broadcast urea off the litter and into the soil. That's how I apply it (actually 35% N lawn fertilizer in my case).

Thank you so much Michael. I've been using Miracid, but aside from the expense, I really didn't want to keep adding P,K to my soil. I know we've had these discussions ad nauseum about whether foliar feeding works or not, but I thought I might give that a whirl. Maybe not. In this heat it might burn the foliage. My border is just so packed with plants that when broadcasting Urea, I'm never quite sure of the coverage. Everything is just looking so yellowed out by now that I've got to do something. Hose end sprayer? Hand carry buckets of liquid nitrogen to the border? I'm too hot and worn out to think just now. But thanks for the recipe of 2 teaspoons of 46-0-0 to a gallon of water.

You can buy 46-0-0 in 50 lb bags at many farm co-ops and hog feed stores. If you use it as Michael suggests, and I do, understand it easily burns so it's important to spread it thin and water it in well. I've found that applying a little bit often give a steady feed without any sudden spurts of growth. The bushes grow steadily and green up quickly. Avoid the EZ Flo fertilizer system you hook up to your hose. The idea sounds good but you have no control of the application rate except by the strength of the product you put into it. As the product is more and more diluted in the container it becomes more water and less fertilizer.
They have a hand carried fertilizer gizmo that broadcasts the dry fertilizer out in front of you as you carry it and turn a little attached handle. I believe you can gage the anount of product used.
Gilmour makes a hose end sprayer that is great at dispensing product accurately. You'd have to dissolve the fertilizer in warm water, place it in the sprayer and set it for the area you want to cover. It pulls the product into the stream of water at a set rate. When the container is empty the fertilizer or other product is applied.

The recipe may not be safe on foliage in summer, I probably wouldn't do it.

Thanks Karl for the advice. We've been using 46-0-0 on our grass and roses for years now after getting the soil analysis done by our county ag agent. You can't beat a good soil analysis for telling you what you need and don't need....Anyway for reasons stated above I wanted a liquid product for this particular border.....Michael, you and I had the same thought. I just don't want to experiment with liquid Urea on my foliage in this heat. So I used my hose end sprayer(Gilmore)and did Miracid. Conditions have ameliorated somewhat, and the border was thoroughly watered beforehand. I've done this before and haven't had a problem so far(it is all non-rose foliage btw).....The liquid urea formula may be used later on as a non-foliar feed so thank you again Michael. In this part of the country I am not alone with this dilema.

For a number of years I had a fertilizer injector attached to my watering system. The 40 gallon barrel used to hold the fertilizer was kept filled with 46-0-0 diluted with water to dissolve it. I'd dump a bag of it into the barrel and fill the rest with water and let it stew. The injector was set on two parts per million so every time I watered a little nitrogen was applied to the roses. The filter for the injector restricted the flow and thus the coverage too much so I stopped using it. The filter was necessary to avoid an expensive rebuild of the injector every two years.
I still have the injector although I haven't used it for a number of years, and the barrel still awaits it's charge of 46-0-0 and water.

I bought a siphon that attaches to the faucet then the hose with a rubber tube with screen that I drop into a 5 gal. bucket. I just mix a soluble fert. in the 5 gal bucket and water with a hand wand. I then follow with about the same amount of fresh water. I try to avoid letting the ground totally dry out and here in Houston this year that is tough!