Dianthus barbatus (Sweet William) is a species of Dianthus native to southern Europe and parts of Asia which has become a popular ornamental garden plant. It is a herbaceous biennial or short-lived perennial plant growing to 13â92 cm tall, with flowers in a dense cluster of up to 30 at the top of the stems.
The hair on your head grows about six inches per year on average, or about half an inch per month. Each hair grows for about two to six years then stops and enters the telogen phase, during which it is gradually shed. On average, you lose about 50 to 100 hairs per day. Often, the growth cycle of the follicle starts over and a new hair begins to grow in after one is shed.
It depends on you, on the weather, and on your age. For most people from about eight to about thirty, hair grows about 3/4 of an inch a month. It tends to grow faster in warmer weather, perhaps an inch a month, and somewhat slower in cold weather. That's the hair on your head, of course. Hair grows roughly as fast as fingernails. And when you get older, the hair tends to become brittle and break off; that makes it look as if it is growing slower. Some people have hair that grows faster, and some have slow-growing hair, but most people are pretty close to the average of .75 inch per month. Figure nine inches a year as a good average. p.s