flowers must be present and receptive for any pollination strategy to work, so confirming flower type first keeps the effort from being wasted.
Steady moisture matters more than a daily watering rule
Inspect fruit and roots before blaming pollination
A shriveling or yellowing young zucchini does not always point to pollination failure. The symptom looks similar whether the cause is inadequate pollen transfer, heat stress, water stress, root damage, disease, or a nutrient problem, so the fruit itself is a starting clue, not a final answer.
University of Delaware Extension
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