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.
A tender perennial is unlikely to survive any frost; a half-hardy perennial may be able to survive the same frost that killed the tender perennial. There are no absolute temperature values to discuss when assessing the cold tolerance of perennials.f these herbaceous perennials, hardy plants are those most likely to survive the winter. Tender perennials are the plants least likely to survive the winter, and half-hardy perennials survive better than tender perennials but not as well as hardy perennials.