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.
Types of Tender Plants. Tender perennials are usually categorized as half-hardy perennials, subtropical and tropical. These categories are based on the plantâs ability to tolerate certain temperatures. Half-hardy plants can tolerate long periods of cold temperatures, but they will not survive frost.he term âtenderâ is typically given to perennial plants, although some annuals are grown as tender perennials in warmer climates. The term âtenderâ is usually used in reference to perennial plants. Annual plants are those whose life cycle lasts one year, and these plants are typically propagated by seed.