Bring some extra character to your yard with the Southern Living 2 gal. Senecio Skyscraper Shrub. Senecio Skyscraper is a strong, upright grower, reaching 2-3 ft. in one growing season. No staking or support necessary. The shrub boasts a fabulous blue-green color and serves as a new structural component for succulent gardens. It can also be used as a house plant. Senecio Skyscraper does best in USDA Zones 10-11. However, there is a simple solution for gardeners in Zones 8 and below: plant the Skyscraper Senecio in a pot and bring it indoors for the winter. Place it in a sunny window and return it outside once the threat of frost passes in the spring.