March launches the most exciting stretch of the gardening season. Tiny green sprouts push through soil, trays crowd windowsills, and gardeners start dreaming about towering tomatoes, crunchy cucumbers, and armloads of herbs. Those tiny seedlings promise big harvests later in the season, but they also attract a lineup of microscopic troublemakers that wait for exactly this moment.
Seedlings grow fast, but diseases move even faster. A healthy tray can turn into a sad patch of collapsed stems or spotted leaves in a matter of days when the wrong conditions settle in. Cool temperatures, damp soil, crowded trays, and still air give plant diseases everything they want. March delivers those conditions almost perfectly, especially when seed trays live indoors under lights or near windows.
