A number of rootstocks that have been tested and used commercially in Southern Africa are used at Du Roi Nursery.
The rootstocks are listed according to their effect on tree vigour:

Vigorous
- Rough Lemon (RL)
- Volckameriana (Va)
Intermediate
- Swingle Citrumelo (SC)
- Carrizo Citrange (CC)
- Troyer Citrange (TC)
- MxT
- X639
Dwarfing
- C35
- Benton Citrange (BC)
- Yuma Citrange (YC) - Intermediate for Grapefruit