Why flowers but no fruit
Crop thresholds for heat blossom drop on tomatoes, peppers, beans, and squash, plus cool-crop bolting guidance and Seeds Now replant picks.
Crop stress thresholds
| Crop | Trouble when | Seeds |
|---|---|---|
| Tomato | Days often above ~90-95 F or nights above ~70 F / below ~55 F | Shop Seeds Now |
| Pepper | Same heat bands as tomato; cool nights also stall set | Shop Seeds Now |
| Bean | Heat waves during bloom drop blossoms | Shop Seeds Now |
| Squash / cucumber | Hot days and warm nights skew male flowers | Shop Seeds Now |
| Cool greens | Heat plus long days trigger bolting | Shop Seeds Now |
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Sources and planning limits
Heat responses vary by crop, cultivar, night temperature, and exposure. Temperature ranges describe common stress conditions, not exact thresholds for every plant.