Jack's Classic Calcium Nitrate Fertilizer Part A & B Dual Pack – 4.4 lb total (15-0-0)

Overview

Upgrade your vegetative program with the redesigned Jack's Classic Part A and the complementary Part B in a two-part, hydroponic-ready nutrient system. This pairing emphasizes soluble, readily available nutrients to give growers more flexibility across different crops and environments.

The Part A component blends micronutrients with well-balanced macro nutrients to support robust vegetative development, while Part B delivers a highly soluble source of calcium and nitrate nitrogen. Together, they create a complete feeding rhythm suited for hydroponic setups, soil-less media, and other soilless systems.

What’s Included and How It Works

• Two-part pack: You receive (1) 2.2-pound bag of Part A and (1) 2.2-pound bag of Part B for a total of 4.4 pounds.
• Two-part system: Part A (micronutrients) works in harmony with Part B (macronutrients) to provide a balanced, complete feeding.

• Key benefits: Part A supports root and leaf growth; Part B promotes calcium uptake and leaf strength for a healthy look and structure.
• Ease of use: Water-soluble powders mix with water to feed multiple gallons of nutrient solution, reducing handling of liquids.
• Designed for hydroponics: Built for continuous liquid feed programs with clear mixing instructions by volume.

Why Growers Choose Jack's Classic

This formulation emphasizes solubility and availability, helping you tailor nutrition to your grow cycle. Additionally, the product can help manage media pH and certain mineral levels, offering flexibility in your feeding strategy. Made in the USA, the blend reflects a focus on quality and consistency.