All gardeners know the importance of nutrients and minerals to a healthy crop. Chief among them is magnesium. Sea Mag offers a natural source of magnesium, which is absolutely vital for chlorophyll production and a healthy plant. The feed can be used with just about any medium, and is even suitable for use with hydroponic systems, making it an excellent choice for just about every kind of gardener. Made by trusted brand Humboldt Nutrients, this mix has been carefully engineered in California. With Sea Mag, you can expect a healthier yield than ever before.