Living in Aliso Viejo, CA we have a very hot summer and sometimes a light frost in the winter.

Knowing that, I'd like to receive suggestions of interesting plants for a deck.

The plant:

1- Will be in full sun in a round plastic container 1 ft wide by 1 ft deep;

2- Cannot be more than 5 feet tall;

3- Shouldn't be more than 1.5 feet wide, since it will be along both sides of an entrance door;

4- Shouldn't have thorns for the very same reason;

I appreciate the help!