Talking Humidity & Plants With Jeannie Phan Mulhall's Your Companion Planting Chart for a Healthier, Happier Garden Late Blight, The Most Dangerous Potato Disease February marks the start of planting and early crop growth. As rains settle in, late blight risk increases, especially in cool, wet conditions. Watch out Three Dogs in a Garden: A Garden filled with Lavender & Heather 400 Million Years Old Plant: The Story of Cooksonia A Modern Herbal Fennel