The colour of the mulch film does make a difference when it comes to weed suppression and light exposure for crops. Black mulch film is ideal for most vegetables, as it blocks light to prevent weed growth while warming the soil. Black also contrasts with most plants, making it easier to spot and remove any weeds that do poke through. White or silver mulch film can be beneficial for crops that need more light exposure, like melons, squash, and cucumbers. The lighter colours reflect sunlight up to the plants. However, white film won't suppress weeds as well.