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Common Reasons for Lack of Fruit Set
Several factors can prevent tomato plants from setting fruit even when they flower. These include inadequate pollination, extreme temperatures, nutrient imbalances, watering issues, pest and disease problems, and genetic factors. Each of these issues can interfere with the plant’s ability to transition from flowering to fruiting, and understanding them is key to finding effective solutions.
1. Inadequate Pollination
Tomatoes are primarily self-pollinating, but they still require some movement to facilitate pollen transfer. Inadequate pollination can occur if there is insufficient wind or insect activity, especially in enclosed environments like greenhouses. Without proper pollination, the flowers will not develop into fruit, leading to a lack of harvest.
2. Extreme Temperatures
Tomato plants are sensitive to temperature extremes. High temperatures above 85°F (29°C) during the day or 70°F (21°C) at night can cause the flowers to drop off before pollination occurs. Similarly, temperatures below 55°F (13°C) can also hinder fruit set. These conditions stress the plant and disrupt the normal flowering and fruiting process.
3. Nutrient Imbalances
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