This 30-cell module tray of my own design is made of strong and durable recycled polypropylene.

It has wide holes at the bottom which enable plants to be pushed up easily and also improve drainage. The tapered cells require less compost and result in no waterlogging around the roots. The polypropylene creates smooth and solid cells that help plant rootballs slide upwards with little or no damage to the plant roots, and none to the tray.

The tray is also available with 15 and 60 cells. The cell size is the same in all three, the only variable is number of cells per tray.

More information in these YouTube videos:

• Charles Dowding module trays of 15 and 30 cells

• My 60 cell and long life module tray

International distributors

North America: All About The Garden

Australia and New Zealand: Sow Your Seeds

Benelux: The Farm Dream  (deliver to most countries in western Europe)

Denmark: Bjarne's Fro Og Planter

Ireland: Quickcrop

Jersey, The Sustainable Cooperative (no online sales)

Norway: Lindholmgard  

Poland: Plena Natura

Sweden: Lindbloms Frö and Garden Market