Placement and use
Use French marigold along bed fronts, at path-side corners, or in short repeated runs that visually finish a planting area. Keep the plants inside the bed edge rather than letting their mature width spill into a narrow walking route; a planted strip about 1 foot deep gives each plant room while preserving circulation. In containers, place it near the outer rim or as a low middle layer beneath taller plants, leaving enough open surface for watering.