Use Natural Guard HuMic before you plant - you'll love the results! HuMic is a granular humic acid soil amendment that's perfect for flower beds, vegetable gardens, lawns, indoor plants, and even compost bins. It's a concentrated soil conditioner made from decomposed organic plant materials and humic acids to stimulate soil microbes and help encourage plants to take up nutrients. HuMic encourages plant root development, but is not a replacement for fertilizer. 4 pound bag.