Summary: 1  Rubbing alcohol (isopropyl alcohol) is the worldâs most commonly used skin antiseptic. 2  Rubbing alcohol is made from coal gas and water. In the United States, manufacturers also use a sulfuric acid in the manufacturing process, and tiny amounts of sulfuric acid remain in the finished product.
Frost Tender or Heat Tender. The basic definition of a tender plant is a perennial plant that will not survive the winter outdoors because it is sensitive to frost, but some plants are also labeled as heat tender.ost plants classified as tender do not thrive in cold temperatures, while those classified as hardy can survive wintry conditions, although the lowest temperature these plants can handle varies from plant to plant.
Having said that, a tender perennial is a plant that is a true perennial (lives longer than two years in the garden), but is not hardy in the zone where its being sold, and will not survive the winter if left outside. A lot of the plants that are sold as annuals here in MN are actually tender perennials.nnuals are plants that you have to replant every year. True annuals are plants that, in one growing season, start from seed, quickly grow to maturity, bloom continuously, set seed and then die. Most annuals grown here in zone 4 will be killed off by frost before they reach the end of their life-cycle.