Plastic Petri Dishes

Sterile plastic petri dishes, 90x15mm for culturing bacteria or germinating seeds. Great prices when you buy 1 pack; unbeatable prices when you buy more.  

Petri dishes can culture molds or bacteria or act as a small enclosed environment for insects and plant seedlings or even as a display case. These petri dishes are made from clear polystyrene and are sterilized.

We do not supply them with agar but gelatin ("jello") can be used instead although it liquifies around room temperature.

Simple Culture Media Preparation

A very basic recipe for nutrient agar to grow bacteria would be:

  • 0.5% powdered milk or whey protein concentrate
  • 0.3% beef extract (beef bouillon cubes)
  • 1.5% agar

% means weight by volume. In other words, if you have 1 litre of water (1000g), add 5g of powdered milk, 3g of beef extract (or ~1/5 of a bouillon cube) and 15g of agar. Mix & heat in a pressure cooker to sterilize, then pour into the petri dish, close the lid & let cool down.

Displaying 1 to 3 (of 3 products)
Polystrene Petri Dish 20 Pack

Polystrene Petri Dish 20 Pack

SKU: 22700-9
$5.95USD or lower Each


SKU: 22700-9MK1
$11.25USD or lower Each
Seed Germination Kit

Seed Germination Kit

SKU: 22700-SG
$16.95USD Each
More Information

What are Petri Dishes Used For?

  • Culturing bacteria or mold
  • Germinating seeds
  • Displaying products
  • Move iron filings with magnets