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.
When considering tender perennials, as well as tender shrubs, for your northern or midwest garden it is important to understand the preparations required for winter. A perennial is considered tender if it is not fully hardy in your zone, or may not be recommended for your zone at all.