The fern should be safe if sprayed with the solution described above and sure, spray it on the ground: If you don’t want to use fungicides, try spraying your plants with a bicarbonate solution: Mix 1 teaspoon baking soda in 1 quart of water. Spray plants thoroughly, as the solution will only kill fungus that it comes into contact with. Reply
The fern should be safe if sprayed with the solution described above and sure, spray it on the ground:
If you don’t want to use fungicides, try spraying your plants with a bicarbonate solution: