My grandfather always watered his tomatoes at the exact same time every evening: I thought it was an old man’s habit until my own harvest turned black underneath
Your grandfather’s rigid evening watering schedule wasn’t stubbornness—it was a precisely timed defense against fungal diseases that can obliterate a tomato crop in days. When one gardener ignored this wisdom, their harvest turned black. Here’s the science he discovered too late, and how to fix it.