If you’re not sure what to feed your hydroponic plants, here’s the simple solution: Root Farm™ Part 2 All-Purpose Nutrient. This concentrated nutrient supplement is versatile enough to feed all types of plants – at all stages of the growing cycle. Herbs? Yep. Lettuce? Of course. Kale and other leafy greens? Those, too. This all-purpose nutrient provides key nutrients for a wide variety of plants. Plus, it mixes easily with water and works with soil-less growing media, too. For best results, use with Root Farm™ Part 1 Base Nutrient.