Quince Rootstocks
BA 29
Gardens with high-density planting can be established with apple trees grafted on BA 29 rootstocks just like M9. The plants grafted on the BA 29 can be spaced with 4 x 1,2m or 4 x 1,5m intervals. It is moderately tolerant to the fire blight and can also be used for quinces.
Quince A
It is a shallow rooted, semi-vigorous, quince-based rootstock. Quince A is resistant to the soil bacterium called Agrobacterium tumefaciens and it is moderately tolerant to fire blight. The tree grafted on Quince A bears fruits early. It is moderately resistant to underground water and lime. It is suitable for high-density planting. Since there could be graft incompatibility with some of the pear varieties, Williams being in the first place, inter-stem rootstock should be used.