phosphorus
Phosphorus [p] is the second of three major nutrients that are essential to plant survival. Combined with nitrogen [n] and potassium [k], these three are known as the 'macronutrients'. These nutrients are needed in large quantities for plants to flourish. Just as humans need oxygen, protein and carbohydrates to function properly, plants have the same reliance upon the macronutrient group. Phosphorus, along with nitrogen, is an essential element in the formation of chlorophyll in plants. Phosphorus also aids in the formation of necessary energy components such as sugars and starches.

Guaranteed Analysis

500 mL bottle w/ locking pump
(treats up to 8,300 gallons)
Price: $14.99