As a pear ages, it's best to thin quarter-size fruit to one or two pears per cluster, with clusters 5 inches apart. This thinning practice will discourage the tree from alternate bearing. Pears grow quickly here and require little or no fertilization. Since yours is growing so well, I would simply skip fertilizing. Vigorous growth is more susceptible to bacterial fire blight, the disease that attacks after a tree blooms and leafs out.
Fire blight blackens the foliage and shoot tips.
Then when the rains do come, the trees will flower. This can result in either a small crop the following spring or no crop at all. Keep your tree watered during prolonged dry periods to avoid this. A limited amount of graftwood will be available. I have two Santa Rosa plum trees that have yet to flower.