Popsugar Living Gardening DIY Plant Fertilizer 4-Ingredient Natural Plant Fertilizer That Costs Next to Nothing June 15, 2018 by Kelly Ladd View On One Page Photo 1 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Ingredients What You’ll Need: 1/2 tsp. household ammonia 1 tsp. baking soda 1 tbsp. Epsom salt 1 gallon water Bucket Something to stir the liquid, like a stick, paint stirrer, or a garden trowel Watering can Previous Next Start Slideshow Gardening