Use a container which is about two to four inches larger than the current root ball of the plants. As the plants grow, gradually step them up into larger containers. The plants should last at least a full year in one container, but if they grow quickly, they could outgrow the container. At plant maturity, the maximum container size should be about 20 gallons. You can use larger containers, but they will be even more difficult to move. Platforms with coasters are now available which can be used to move the plants in and out. The more you can keep the plants outside in full sun, the better they will perform. Use a well-drained potting soil in the containers. Add a slow-release fertilizer to the mix. Once a month during the growing season, apply a water-soluble fertilizer. Be careful not to overwater the plants. Allow the top two inches of the medium to dry out between waterings. Make sure quite a bit of water flows out of the bottom of the container when watering, to flush out excess salts.

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