I planted some flowers in two hanging baskets just recently. In the past the potting mix dried out real quick even with water saver crystals in it.

This time I dumped the potting mix in a container and redone the method of putting the potting mix back in. The baskets are about 12 inches in size. I put about   1/2 inch mix in the bottom of the basket and then placed a disposable soup bowl in the bottom. Refilled the container with potting mix while putting the flower plant in.

With the potting mix being in the bowl it should hold about 1/2 cup of water or there about for the plant to draw from when needed. 

Watering very frequently in the past was a pain to keep up with.

Planted two violas, one blue and the other yellow.

See how this idea works out.