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Agar, nutrient, 100 g, dehydrated

Ages 12+
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Add water to this dehydrated nutrient agar powder to see a media grow bacteria. This 100 g bottle makes 3 liters of a nutrient sugar agar mixture - enough to cover about 250 petri dishes! Read More

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Nutrient agar is the most commonly used media for filling petri dishes and growing bacteria. Using this dehydrated nutrient agar, you can make about 3 liters of a nutrient agar mixture - enough to fill about 250 standard 90-100 mm petri dishes (not included). 

Formula Mixture
Form Powder
CAS # Mixture
DOT Classification Non-Regulated
Storage Code Green


Try This Fun Recipe: *Makes 100 ml of nutrient agar solution - enough to cover 7-9 standard 90-100 mm petri dishes.

  • Mix 1 level teaspoon of dehydrated agar with 100 ml (3/8 cup) of room-temperature water.
  • Bring to a boil while stirring to ensure the agar is completely dissolved.
  • Pour 10-12 ml of hot agar into each petri dish, just covering the bottom.
  • Replace the dish top immediately after pouring to prevent contamination.
  • Let dishes stand for 1 hour, allowing agar to solidify. 


  • This agar can be sterilized in a pressure cooker before pouring into the sterile plastic dishes. Use 15 lb. pressure for 15 minutes.
  • We provide more information about how to use agar & petri dishes


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