We prefer for roots to be sent to us wrapped in paper rather than plastic - Ideally in a wet tissue (newspaper) and in a not completely closed plastic bag e.g. in a well labelled paper envelope.

Normally we are able to identify roots of 1-2mm in diameter.
 

A root length of 5cm or longer is ideal.
 

It is advisable to label every sample with details including your reference code or sample address, date of collection, trial pit number and depth where applicable.

Twig material should preferably have buds and fresh leaves, if this is not possible due to the season, please contact us for directions.

NB: Please do NOT use staples to secure the envelope, sellotape is fine