harveyc

There are two factors the affect the need for hand pollination. One, as you pointed out, is when the stigma isn't close to the anthers. Another one, however, is that some varieties don't seem to be receptive to their own pollen and set fruit better if pollinated with pollen from another variety. Yet another factor that seems to affect the need for hand-pollination is climate. I've read reports from some growers who are certain a particular variety does not set fruit for them unless they hand pollinate while another grower gets a good crop with the same variety without any intervention. It seems that a more humid environment may help maintain viability of pollen and increase the odds for success.

Good luck!

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