To make soil moist throughout the summer, here is the simple way.
Take a plastic empty bottle and drill a hole in the cap of the bottle.
Cut the bottom of the bottle so that you can pour water and store it.
Close the cap and place the bottle in the pot and then fill up with the gardening soil.
Make sure the back side of the bottle should be 1 inch or more from the soil base.
Fill the bottle with water.
Now you can leave your plant out in the sun for hours without worrying or soil drying.