Why Your Zucchini Flowers But No Fruit
Zucchini flowers but no fruit when pollination fails. Hand-pollinate or wait for bees. High heat also causes flower drop.
Zucchini has separate male and female flowers. Only females produce fruit.
Male vs Female
| Feature | Male | Female |
|---|---|---|
| Stem | Thin | Small fruit at base |
| Bloom time | First | 1-2 weeks later |
| Function | Pollen | Fruit |
Hand-Pollination
- Pick a male flower. Remove petals.
- Find a female flower (small fruit at base).
- Brush pollen onto female’s center.
- Do this in the morning.
The 3 Causes
| Cause | Fix |
|---|---|
| No pollinators | Hand-pollinate |
| High heat (90°F+) | Shade, wait |
| Only male flowers | Wait 1-2 weeks |
Common Questions
Why only male flowers? Males appear first. Females follow.
How do I hand-pollinate? Brush pollen from male to female.
Can I eat the flowers? Yes. Male flowers (no fruit at base).
How long after pollination? 3-7 days for fruit to appear.
Does heat cause drop? Yes. Above 90°F, pollen is sterile.
Will it recover? Yes, when temperatures cool.