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.
Onions grow as spring, summer or winter plants in mild, Mediterranean climates, and so they can be planted any time from spring through early fall when the soil is dry enough to work easily. Suitable red onion varieties for those climates include âRed Globe,â âCalifornia Redâ and âRed Torpedo.â