Potato Dextrose Agar

Potato Dextrose Agar is used for the cultivation of fungi in a laboratory setting. Potato Dextrose Agar is not intended for use in the diagnosis of disease or other conditions in humans. Conforms to Harmonized USP/EP/JP Requirements.

Potato Dextrose Agar (PDA) is a general purpose medium for yeasts and molds that can be supplemented with acid or antibiotics to inhibit bacterial growth. It is recommended for plate count methods for foods, dairy products and testing cosmetics. PDA can be used for growing certain yeast and molds. The nutritionally rich base (potato infusion) encourages mold sporulation and pigment production in some dermatophytes.


Formula Liter
Potato Infusion from 200 g *4 g
Dextrose 20 g
Agar 15 g

  *4.0 g of potato extract is equivalent to 200 g of infusion from potatoes.
Final pH: 5.6 ± 0.2 at 25°C
Formula may be adjusted and/or supplemented as required to meet performance specifications.


  1. Suspend 39 g of the medium in one liter of purified water.
  2. Heat with frequent agitation and boil for one minute to completely dissolve the medium.
  3. Autoclave at 121°C for 15 minutes.

Order Details

Product # Product Description
7149A Potato Dextrose Agar, 500 g
7149T Potato Dextrose Agar, 5 kg
7149C Potato Dextrose Agar, 10 kg