what causes blossom drop on franklin tree?
Blossom drop is usually caused by an environmental stress of some sort. It could be moisture stress from lack of water in the soil, low humidity, or drying caused by winds or excessive heat from sun beating on the blossoms. It's also possible for fungal diseases to cause blossom drop. In that case, you should be able to see browning or discoloration on the blossom.
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