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There are several rootstocks
for pears which are grafted on to quince stock.
Quince B is comparable to MII of apples, making
large trees which crop heavily but take longer
to come into bearing than the more dwarf stocks
(such as Quince C, which is used for pyramids
and cordons). Also, those pears which are slow
to begin cropping, e.g. Comice and Beurré
Hardy, should be worked on this stock. Quince
A comes somewhere between these two stocks and
is the rootstock mostly used.
Where a large standard tree is required, pears
are worked on wild pear stock and this is also
used for the weaker growers. It is the most vigorous
rootstock.
Trees on quince stock must be planted with the
graft at least 8cm (3in) above soil level so that
scion rooting does not occur. Take out a large
hole so that the roots can be spread out well,
making it a depth such that the graft is comfortably
above the soil after treading it down. Sprinkle
peat over the roots and mix in the nitrogenous
humus before replacing the soil, treading it well
down. Then stake the trees as for apples.
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