Oyster mushroom facts

Oyster Mushrooms are found on deciduous trees such as willows and occasionally on pines. The mushrooms are fleshy, gray, white or brown. The caps are eight inches in width in a semi-circle shape. It has feathery gills which are yellowish or white. Besides live trees, it grows on the fallen branches or stumps.

Name Oyster mushrooms
Scientific Name Pleurotus ostreatus
Common/English Name Oyster Shelf, Tree Oyster, Tamogitake and Straw Mushroom
Plant Growth Habit On dead hardwood trees
Growing Climate Temperate and sub-tropical
Stem Nearly absent
Cap shape and size Broad, fan or oyster shape, convex and semicircular; Width: 1-12 inches, Thickness: 1/2-1 ½  inches
Cap color White-gray or tan-dark brown
Gills White-cream
Spore print White-lilac gray
Flesh color White, firm, thick
Taste Mild-strong
Major Nutritions (Raw) Vitamin D (Cholecalciferol) 25 µg (166.67%)
Vitamin B3 (Niacin) 4.262 mg (26.64%)
Copper, Cu 0.21 mg (23.33%)
Vitamin B2 (Riboflavin) 0.3 mg (23.08%)
Vitamin B5 (Pantothenic acid) 1.113 mg (22.26%)
Phosphorus, P 103 mg (14.71%)
Iron, Fe 1.14 mg (14.25%)
Vitamin B1 (Thiamin) 0.108 mg (9.00%)
Vitamin B9 (Folate) 33 µg (8.25%)
Tryptophan 0.036 g (8.18%)
Health Benefits
  • Maintain the levels of blood sugar
  • Immunity system
  • Cardiovascular conditions
  • Skin problems
  • Brain health
  • Cures anemia
  • Provides energy
  • Prevents tooth decay
  • Maintains mood
  • Alcoholism
Calories in 1 cup sliced (86 gm) 28 Kcal.
  • Some people might experience gastrointestinal upset because Oyster mushrooms possess sugar alcohol, arabitol.
  • Some people experience reaction to the spores of mushroom.
  • It should not be consumed in excessive amounts.
How to Eat
  • An Oyster mushroom is commonly used in Chinese, Japanese and Korean cuisines.
  • It is added in soups, stir-fry or stuffed.
  • Oyster mushrooms are used in various dishes in Kerala.
  • In Slovak and Czech, Oyster mushrooms are added to stews and soups as a substitute for meat.


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