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How to stop flower drop-off for my greenhouse tomatoes?

3 years ago

I am growing a few varieties inside of a greenhouse in Oahu. We are seeing lots of flower drop-off as the heat has been increasing to about 87F. Our humidity ranges between 60-70% during the day, then up to 85% in the evenings. I read online that tomatoes prefer 80% during the day and 60-70% during the evenings. I’m not sure if we should add another watering cycle later in the day but it seems it may help due to the plants transpiring so much (low VPD pressure) during the day. Please share any comments or feedback you guys may have with your experience growing tomatoes in warmer climates inside of the greenhouse. Thank you!

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