It is often thought that the wall hanger will automatically stay wet when it has rained. This is not the case, the surface into which the water can fall is limited. So make sure that the flower pouch remains moist. Too much water is not possible, because a hole has been made at the bottom of the pouch where the excess water can drain.
Use a PET bottle
To make watering easier, you can use a PET bottle. You can fill this with water and then place it upside down in the black plastic pipe (photos on the right). This forces the water from the bottle through holes in the watering pipe. This keeps all the water in the flower pouch. If you do this once every 2 days in sunny weather, and once every 3 days in darker weather, the flower pouch will have enough water available for optimal flowering.
The potting soil is specially formulated for the flower pouch. It slowly releases fertilizers in the right amount and composition. This will not be enough for a long period of time. When the plants appear to be short of fertilizers (yellow leaves, fewer flowers) you can add bedding plant food. This is available at garden centers.