I watered my zucchini over the leaves at dusk just to spare them the heat: by mid-August, I saw what those humid nights had left on every leaf
A well-intentioned evening spray to protect zucchini from summer heat inadvertently created the perfect humid microclimate for fungal disease. By mid-August, the damage was unmistakable: white powdery coating and yellow angular patches spreading across every leaf. This is what happens when watering method matters more than watering schedule.