"blossom drop" in many varieties of tomatoes: They bloom nicely but the
blossoms fall off. The latest postulate that I read is that the pollen
becomes sticky and does not release. Have you tried getting two canes
close together and tapping sharply to release pollen? That simple
expedient increases yields during the "regular" season and may help
toward the end of the season. Down here in this zone (9), tomatoes
frequently stop bearing by mid-July. Although, they may continue to
bloom well into August, they don't set fruit.
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