Overt hypothyroidism is defined as a clinical syndrome of hypothyroidism associated with elevated TSH and decreased serum levels of T 4 or T 3. The measurement of thyroid autoantibodies helps in diagnosing an autoimmune process. However, this test should be ordered only if it will influence the decision to treat.
The American Rhododendron Society measures the growth rates of numerous species and hybrids. Speed of growth is determined by calculating how tall a plant grows in 10 years. Many rhododendron plants grow from 3 to 4 feet in 10 years, but some can grow up to 7 feet in 10 years.Some of the fastest growing rhododendrons are the Brittenhill Bugle, R. genestierianum, Ilam Cream, Mother of Pearl, Professor Hugo de Vries, Spicy Nutmeg, and the Whidbey Island.picy Nutmeg. Spicy Nutmeg is a fragrant, fast-growing rhododendron that has funnel-shaped, 3 1/2-inch wide flowers with wavy lobes. The flowers are pale purplish-pink with reddish-purple rays and spotting in the flower's funnel throat.
A plant/tree/shrub marked slow growing will only grow about 6 inches or less a year when established. A plant marked medium will grow between 6 to 12 inches per year. A plant marked fast growing will grow 12 inches or more a year. This assumes the plant is planted in optimum conditions. Factors that will effect growth are, how much sun, morning or evening sun, water and dirt. So too your Boxwood. A boxwood in the Midwest is usually considered a slow grower.