The medium used for
propagating seedlings or cuttings should provide high oxygen and moisture
medium should ideally provide a higher percentage of air (“air-filled
porosity”) than ordinary soil.
is required because developing root systems need more oxygen than those that
Water: The medium must retain sufficient
water to minimize the risk of the root zone becoming dry. Water must also be
able to drain freely from the pore spaces in the medium. Failure to do so
can cause diseases to develop and roots to become starved of oxygen. This
can eventually cause seeds to rot before germinating, and cuttings to rot
before roots begin to form.
Common media for cuttings and
Examples of appropriate media are (Fig 17.9):
- Perlite (1 part) + vermiculite (1 part).
- Coco Peat (2 parts) + coarse river sand (5
- Perlite (2 parts) + coarse river sand (2
parts) + coco peat (1 part).