Sweetpeas
Not traditional thought of as a bedding plant, they are sold in large quantities so I have included them, they can be used to add height and colour not forgetting the sweet scent.
Usually sold as tall or spencer mixed.
sweetpea pots 
sweetpea patio pots
Compact types make good patio pots.
Sweetly scented, masses of flowers they can add height to the garden. No garden used a dwarf type in a patio pot.
The stems may need support and you need to deadhead to encourage new flowers.
