nitrogen
Nitrogen [n] is the first of three major nutrients that are essential to plant survival. Combined with phosphorus [p] and potassium [k], these three nutrients 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. Plants require nitrogen to construct biopolymers and proteins. Nitrogen is also an important component of chlorophyll, and is critical to a plant's ability to absorb and convert light energy.

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