Calculating fertilizer mixing ratios for garden hose sprayer.
I know I see people discussing mixing ammonium sulfate into gallons of water, but I was wondering if anyone uses one of those garden hose sprayers that has a canister attached to it which is used for fertilizing or weed killing.
I ask this because hauling buckets of water to every plant is a lot of work and it would be nice to just hook up a sprayer and go to town on the plants. It would save me some time and possibly my back.
Unfortunately, the lowest setting it can be set to is to use 1 1/2 tsp of solution per gallon of water sprayed. That flow rate is pretty high and adding a concentrated dose of ammonium sulfate to the canister can easily kill your plants.
Here is my thinking in order to get a dilution of say 1/3tsp of ammonium sulfate per gallon:
There are 768 teaspoons in a gallon. I want to spray at a 1: 768 x 3 = 2304:1 ratio per gallon, but my sprayer only sprays at a (1 / 1.5) x 768 = 512:1 ratio per gallon.
Therefore, my ratio is 2304:512, which is 4.5 teaspoons of water per 1 teaspoon ammonium sulfate.
As I said before, my canister is 32oz. There are 192 teaspoons in 32oz of water, so 192 / 4.5 = 42.6667 teaspoons of ammonium sulfate or 14.2 tablespoons.
In conclusion, I would add 32oz of water to the cannister and mix up 14.2 tablespoons of ammonium sulfate to give me the 1/3 tsp per gallon rate to fertilize with.
Does my math seem correct? I want to make sure I am right!