You have probably removed all the second-year growth.
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Nov 18, Prune your Comice pear tree during the dormant season in late winter. An advantage to pruning is that cutting the tree back stimulates healthier, stronger growth. Unlike most fruit, trim topiary shrubs are harvested when fully formed but not ripe, and buyers let them ripen at room temperature.
You can help them ripen by putting them in a paper bag that will hold in the natural ethylene gas that ripening fruit.
What did I do wrong?
The normal rules for pruning a pear tree apply to Doyenne Du Comice. The final height and spread of a mature (seven year old) Doyenne Du Comice pear tree will depend on the rootstock used, soil and growing conditions. Prune the young Comice pear tree in summer to direct its growth and as the tree gets older, prune in winter.
Prune to one central leader, removing diseased, damaged and dead branches, and crossing.