It's smart to choose potted plants according to your needs. If you travel a lot, have a busy schedule or just have a habit of forgetting to water your plants, you need low moisture potted plants. When choosing plants, you must remember that they can withstand less stress from the elements. Therefore, a plant that ordinarily would be tolerant to a hardiness zone of level 7, would only be tolerant to a hardiness zone to level 5 when planted in a container.
There are many varieties of sea holly, which display a pom-pom thistle type flower from lavender to bright blue in color. The stiff leaves are a silver grey. This perennial (comes back each year) grows to a height of 1 to 6 feet, depending on the variety. Potted, it is hardy to zone 7. This plant actually does best when it's ignored, with little water and poor soil. Sea holly makes an interesting cut flower. It is often dried and used in arrangements. Some common varieties are amethyst sea holly, alpine sea holly, flat sea holly, rattlesnake master and sapphire blue sea holly.
With a name like butterfly weed, this plant has to attract butterflies. The larva feeds on the leaves, but not so much that the plant is harmed. It also attracts bees, benefiting other garden plants needing pollination. The bright orange, red or yellow blooms appear to be constructed of many tiny petaled flowers. This drought-tolerant perennial also does well in wet climates. It's height, at maturity, ranges between 1 and 3 feet, depending on the variety. Potted, it is hardy to zone 6. Some common varieties are sunset flower, hello yellow, prairie milkweed and soulmate swamp milkweed.
Sunflowers may make you may think of the 6-foot flowers with huge blooms full of sunflower seeds that are natural bird feeders. However, with all the hybrid varieties, this annual (must be reseeded each year) is certain to find a home in small and large containers. Sunflowers can be found in yellow, orange, red or white with heights from 2 to 12 feet. They make attractive additions to fresh or dried arrangements. This bloom does well in low watering circumstances, as well as in wet climates. It does great in most locations during summer months. Some varieties you may want to try, in pots, are Mexican sunflower, teddy bear, valentine or Italian white.