I wanted to show you a product that I've been using the past couple of years. I've been adding this to soil in hanging baskets in order to reduce the amount of watering needed. There are several brands on the market. I use Soil Moist.
I bought this 3-oz packet a couple of years ago and still have quite a bit left. The packet instructions say to use 1 1/2 teaspoons of granules for a 10-inch diameter basket or equivalent measure for window boxes. You need to mix this into the bottom 2 or 3 inches of soil -- the root zone. This year, I've started fresh with my baskets' soil. I scooped soil into my basket, sprinkled the Soil Moist over it, then mixed it in with my hand before topping with more soil.
Using a moisture retention product doesn't eliminate watering, but it does hold enough moisture that I can water less often. The packet says that their product can cut watering up to 50%.
I wanted to show you just what 1 1/2 teaspoons of this product looks like both dry and wet.
Here is 1 1/2 teaspoons dry granules.
I began adding water and the granules quickly sucked it all up.
So I added more and more water, until I had added just over 1 cup of water to that 1 1/2 teaspoons of Soil Moist. At that point, I quit, as my bowl was getting full. But this is pretty amazing stuff, isn't it?