Great for ALL plants! 0-0-16 (includes Soluble Potash). Guaranteed Analysis 0-0-16Soluble Potash (K2O)…16.0% Use 1tsp per gallon. Stimulates root growth and overall plant health! Can be used in hydroponics, or with houseplants, or any plants!Grower’s Secret Seaweed Powder comes from kelp. Our Seaweed Powder can be applied as a foliar application or through irrigation to provide nutritional support, prevent or correct potash nutrient deficiencies that could limit growth and yields, and improve crop quality. It is suitable for crops of all kinds including conventional, organic, turf, and ornamental.Derived from: Ascophyllum nodosum and potassium hydroxide.