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 are such a versatile vegetable â they feature in so many recipes, so growing your own onions means youâll always have them to hand. They are easy to grow from baby onions called sets, although seed is available, sets are the easiest and quickest way to grow onions.nions are best suited for growing in the open ground, but you could grow a short row or two in large, deep containers or raised beds. They are not suitable for growbags. Plant onion sets 10cm (4in) apart in rows 30cm (12in) apart from mid-March to mid-April.