Is 70% humidity too high for plants? Ideal humidity levels in a grow room range between 50% to 70% in vegetative growth, and 50% to 60% for flowering plants.
When should you lower humidity in flowering? Once your plants are at the flowering stage, lower the humidity to 40-50% to reduce the chances of fungal contamination.
Is 60% humidity too high for flowering? It’s important to lower the humidity levels to 40-50% during this phase. Any humidity level over 60% could potentially damage the plant, which is relying on moisture from the soil to nourish itself.
What happens if humidity is too high in flowering? Moisture buildup and too much humidity in your grow room can result in rotting, like bud rot or flower rot. This is the worst, especially because the results can’t be seen until you’re harvesting, and at that point, it’s too late to fix any problems.