The choice of cultivar depends upon the type of cultivar with specific reference to its dormancy rating.

A dormancy rating of 1 = strongly dormant during winter
A dormancy rating of >10 = winter active or non-dormant

In South Africa the following dormancy classes are most suitable:

• 5 = semi-dormant

• 6 & 7 = intermediate dormancy

• 8 = non-dormant

• 9 = strongly non-dormant

 

Dormant types have a shorter season, but stands have longer production lifetimes and are more suited for grazing. Resting periods are essential to maintain vigour and particularly the prevention of leaf loss during drought.

​

Non-dormant types have a longer season and more harvests per season, but stands have shorter production lifetimes. These cultivars are more suited for hay production and intensive production systems.