1 When the tongue is black or grey, it indicates extreme Stagnation; if black and dry, that indicates extreme Heat Stagnation; black and wet is an indication of extreme Cold Stagnation. 2  Bright red indicates deficient Yin or Excess Heat. 3  Dark red indicates Excess Heat.
Jupiterimages/Photos.com/Getty Images. Onions planted from seed are used as green onions within 40 to 50 days of planting. They are fully grown in 90 to 130 days, depending on the variety. Onions planted as soon as the soil can be worked in early spring are ready for the table by July.
Although green onion seeds will germinate when the soil temperature reaches at least 35 degrees Fahrenheit, the seeds will germinate more reliably when the soil temperature is 45 degrees F. A temperature of 68 to 77 degrees F is ideal for green onion plant growth.ong, green stalks and white, slender bulbs are characteristics of green onion plants. Green onions, or scallions, add a mild onion flavor to many recipes. Green onions are classified as cool-season biennial plants. It takes two years of growth to produce seeds.