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But if the tree is in proper vigor, is well fed, protected from noxious organisms, not allowed to overbear, it should have sufficient energy to make a crop every year, frosts and accidents excepted. It is assumed, of course, that self-sterile varieties have good pollinizing varieties near them; it is always well to plant two or more kinds near together.
Do peaches, nectarines and apricots set fruit with the pollen of one another, and are the various peaches, nectarines and apricots self-sterile, or will most kinds set fruit with their own pollen? We do not count upon pollination between different kinds of fruit.
Is it necessary to have male and female trees, and how can one distinguish them? The almond is monoecious and has perfect blossoms, therefore, there is no such thing as male and female trees in the case of the almond, but most of the best soft-shelled almonds are self-sterile and need cross-pollination from another variety. This is discussed elsewhere in answer to another question.
The Comice pear blooms with the Bartlett, and would therefore presumably be of pollinizing benefit to the Bartlett if the latter should require such treatment. Common experience in California, however, is that the Bartlett is self-fertile and not self-sterile as it is commonly reported in Eastern publications.
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