Answer: It's possible, especially if the Sweet 100's are performing well. If the buds actually form flowers and then fall off, another possibility is that they are not being pollinated. If there's a lack of insect activity, perhaps to use of pesticides in the area, you can try hand-pollinating the open blossoms. If the buds never quite open into flowers, I'd place my bet on excess nitrogen. Hope your tomatoes overcome this problem and produce lots of fruit!
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