MasterBlend 4-18-38 Complete Combo Kit vs General Hydroponics MaxiGro

Buy the MasterBlend kit if you want a complete three-part feeding program for tomatoes and vegetables in hydroponics or containers. Buy MaxiGro if you want one simple powder for the vegetative stage in soil or a basic hydro setup. MasterBlend is the more complete system: it splits calcium nitrate and Epsom salt out on purpose so they don't lock up, and its high-phosphorus 4-18-38 ratio pushes flowering and fruiting. MaxiGro is a single 10-5-14 powder with micronutrients and pH buffering, easier to mix and store, and reviewers rate it slightly higher. Both are dry, concentrated and long-lasting; the trade-off is complexity versus simplicity.

• Choose the MasterBlend kit if you grow tomatoes, peppers or other fruiting vegetables and want the full calcium and magnesium program in one box.
• Choose the MaxiGro if you want one powder for seedlings and leafy growth without measuring three separate components.