MASTERBLEND 4-18-38 Complete Combo Kit Fertilizer Bulk - Balanced

In this review of the MASTERBLEND 4-18-38 Complete Combo Kit, the bottom line is simple: this kit is for growers who want a professional, concentrated, water-soluble nutrient system that is easy to mix and delivers fast, vigorous plant growth. The reviewer found the 3-component packing in the correct 1/1/0.5 ratio removes guesswork and reproduces the standard MasterBlend recipe precisely, making it ideal for hydroponic gardeners and serious hobbyists seeking consistent nutrient balance across multiple crops.

Key Features

• Complete three-component kit: The package contains MasterBlend 4-18-38, Calcium Nitrate 15.5-0-0 and Epsom Salt so growers have all required powders for the classic recipe without buying separate bags.
• Correct packed ratio: Components are packed by weight in a 1/1/0.5 ratio which matches the recommended 12g/12g/6g recipe for reliable nutrient concentrations per 5 gallons.
• Bulk convenience: The 25 pound kit yields large quantities of solution and reduces the need for frequent reordering for several growing cycles.
• 100% water soluble: Each component dissolves readily when mixed individually into water, enabling fast uptake and straightforward preparation of feeding solution.
• Professional grade: MasterBlend fertilizer is used worldwide by professionals, so the formulation supports vigorous vegetative growth and fruiting in crops like tomatoes and melons.

Who It's For

This kit is aimed at hydroponic growers, greenhouse operators and dedicated home gardeners who prepare nutrient solution by weight and want the trusted MasterBlend ratio ready to go. It is especially useful for those who grow fruiting crops such as tomatoes and melons where balanced N-P-K plus calcium and magnesium improve yields and fruit quality.

Less suitable users are casual container gardeners who prefer pre-mixed liquid fertilizers or single-sack all-in-one feeds; if you do not want to measure and mix separate powders into water individually, a formulated soluble concentrate may be easier.

Pros & Cons

Pros

• All three concentrated powdered components are included, removing component sourcing and saving time.
• Correct packing ratio makes it simple to reproduce the standard MasterBlend recipe for consistent results.
• Users report excellent fertilizer quality and notable plant growth, with easy mixing and good value for money.

Cons

• Requires manual measuring and individual mixing of powders, which may be inconvenient for beginners looking for single-solution products.

Specifications

Product name	MASTERBLEND 4-18-38 Complete Combo Kit
Kit weight	25 pounds total
Component contents	MasterBlend 4-18-38, Calcium Nitrate 15.5-0-0, Epsom Salt (Magnesium Sulfate)
Packing ratio	1/1/0.5 by weight (10 lb / 10 lb / 5 lb in this kit)
Standard recipe	12 g MB: 12 g CN: 6 g ES per 5 gallons
Solubility	100% water soluble powdered components
Distributor packaging	Packed in clear bags by PowerGrow Systems

Our Verdict

The MASTERBLEND 4-18-38 Complete Combo Kit is a practical, cost-effective option for growers who mix nutrients by weight and want the exact MasterBlend formula on hand. It pairs professional-grade fertilizer with bulk convenience and clear mixing ratios, making it a smart buy for hydroponic growers and serious gardeners who value consistency and strong plant performance.

Frequently Asked Questions

How do I mix this kit for a 5 gallon solution?
Use the standard recipe of 12 g MasterBlend, 12 g Calcium Nitrate and 6 g Epsom Salt per 5 gallons, dissolving each component separately into water before combining.

Will this work for fruiting crops?
Yes. Customers report especially good results with tomatoes and melons, citing vigorous growth and abundant fruit when used as directed.

Is it ready to use out of the bag?
The kit contains dry powders that must be measured and mixed into water; components are concentrated and intended for growers who prepare nutrient solutions.