Premixed fertilizers are concentrated nutrient solutions that growers buy and dilute with water before sending it out to the crop. Custom fertilizers are made in-house by measuring and mixing water-soluble plant minerals into concentrated stock solutions. Each option differs in cost, complexity, and risk.

Premixed cannabis fertilizers offer growers many advantages, including:

• Simplicity: Most premixed fertilizers are pretty straightforward. They use a two-part formulation for vegetative growth and a different two-part formulation for flowering growth. Supplements like cal-mag provide the crop with additional calcium and magnesium, while bloom boosters help jump-start flowering by temporarily elevating phosphorus and potassium levels.
• Ease of Use: Mixing instructions are simple. Labels suggest dilution ratios, and their company websites offer feeding schedules that indicate which products to use for each week of production.
• Labor savings: The simplicity and ease of use of premixed fertilizers inevitably result in labor savings. Diluting concentrated fertilizer is a quick task, so growers have more time to dedicate to other activities.

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