Hi Alan,
Some years ago I intended to graft pear on hawthorn (Crataegus monogyna) with quince interface. To succeed in one year I grafted first the quince on the hawthorn rootstock early in February. To be able to make the cut for whip-and-tongue connection on the rootstock exposed on the ambient temperature below 32 degree Fahrenheit I took the last part of the rootstock in my mouth and lick up to the temperature of the rootstock end was over 32 degree. Weeks later, after the buds of the grafted quince piece started to swell I grafted the pear on the quince piece. The double connection took and I got my pear tree on the low vigor hawthorn rootstock only in one year ready.
Not all pear varieties are compatible witch quince,
but the first grafted compatible variety can be extended to everyone other.
Have a good luck in your trials!
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