Even if it is important to choose well the plant that you want to use in your pot, it is most important when you have big pots. It is easy for the plants to be dwarfed or to get lost if you use a small plant in large pots. It is a challenge to choose the best plants for big pots which will make your design to be balanced and interesting. Always keep in mind to use thriller, spiller and filler concept while looking for the plants to make a pot to look even cohesive. A thriller has to be dramatic and tall like shrubs, palms, grasses and cannas and you should make sure that the plant will be able to survive the winter.