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.
Another interesting and often confusing category is the group of so called Hardy Osteospermums. These are also perennial and are called 'hardy', because they tend to survive in colder temperatures. This certainly doesn't mean that they are hardy everywhere.his means they are tender and won't survive cold winters. They usually can cope with mild frosts, but in areas where the temperatures drop below -2 degrees Celsius they'll have problems surviving.This explains why most growers list them as an annual plant, even though they are in reality tender perennials.