QO91023 - Survey of Potting Media, Components & Mixes

Nursery operators throughout Queensland generally make their own potting media rather than purchasing ready-made media from a media manufacturer and they produce media for a specific purpose; propagation, indoor plants, outdoor plants, palms or fruit trees. The nutritional status of potting media used throughout Queensland was generally poor. Media nutrition must be considered more carefully by nursery operators if maximum plant growth and plant quality are to be achieved. This is especially the case in media containing hardwood sawdust where nitrogen nutrition is of particular concern.