'Just kept dying on the vine': Gardeners puzzled by poor summer squash harvests

For many home gardeners, summer squash is supposed to be the crop that just keeps giving.

But now a Zone 7A grower from Tennessee has reported the exact opposite, including stunted vines, failed flowers, and harvests so poor they were left wondering what went wrong.

Here's what to know

The Zone 7A gardener took to Reddit's r/VegetableGardening community to see if they were alone.

This original poster asked the subreddit, "Did anyone else get almost no squash this year?"

The OP added that the usual culprit was not to blame. Even after avoiding squash vine borers, their harvest was minimal. 

"Was able to not have a SVB problem this time, but most of them never gave me anything," they wrote. OP said a Delica squash "gave me 1 then died," while their round zucchini "just kept dying on the vine."

Replies in the comments section showed the same pattern extending beyond a single garden, especially among Zone 7b growers in Tennessee, who said squash, pumpkins, and patty pans had all struggled.

Some of the Tennessee responses were blunt. "Basically everyone I talked to had a bad squash year," one commenter wrote. Another said, "Our zucchini performed pitifully this year."

Many commenters stressed that they had not simply ignored the plants. They mentioned regular watering, fertilizer, and in some cases hand-pollinating blooms, but still saw buds drop, female flowers fail, or small fruits rot before they could mature.

Unusual weather was one of the main explanations people raised. A commenter in Middle Tennessee said there had been "very few female flowers" and noted reading that stressed squash plants produce more male blooms. Another blamed "temperature fluctuations," writing: "We had some early highs and some crazy low night temps in July. The whole summer has been weird weather."

More background

The complaints were not confined to Tennessee. Gardeners in Georgia, Missouri, Washington, and the Pacific Northwest also reported disappointing harvests from squash plants that are often dependable and sometimes so productive they become overwhelming.

One commenter offered a more technical version of that argument. "Squash and melons … have flowers that are temperature-dependent for sex-determination," they wrote, saying that a fast swing from 60-degree days to 90 degrees could leave gardeners with "a whole bunch of male flowers with no (or few) females to pollinate, so virtually no fruit."

Worsening heat and weather instability affect backyards, local food supplies, and the everyday routines people depend on. When heat and weather swings interfere with pollination and fruit set, growers may need to adjust planting times, choose heat-tolerant varieties, and stagger plantings to improve their odds.

Gardeners can also keep notes on bloom timing, pollinator activity, and temperature patterns to spot trends from year to year. If female flowers stay small, drop early, or never open, that may point to plant stress rather than a pest problem alone.

As one commenter put it, "Every other squash has been a heartbreak this year." Another added, "This is another consequence of global warming. It will kill Midwestern Zucchini Culture."

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