more male flowers, slow down female-flower development, and begin aborting small fruits before they size up.
University of Minnesota Extension’s weekly vegetable update explicitly cautions that heat effects are gradual and variety-dependent, with hotter conditions more likely to shift the flower balance than to stop pollination all at once.
Those temperature figures are approximate warning conditions, not a universal line where every plant gives up. Variety, humidity, light intensity, soil moisture, and overall plant health all influence how strongly a particular zucchini responds.
A plant
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