All water-soluble fertilizers (WSF) in the Peters® product range contain our exclusive M-77 chelating formula. It is the ‘secret’ behind the guaranteed success of this top tier WSF range. M-77 includes ingredients that enhance the delivery of the solution, its speedy uptake, and the effectiveness of the nutrients on their target organs and tissues. As an additional innovation, M-77 contains a patented plant booster that takes the plant nutrition even one step further. All these ingredients result in healthier, vibrant, and more productive plants.
The M-77 formula contains:
- Compounds extending the effectiveness of the chelates delivered by the foliar spray
- Vitamins that improve the metabolic activity of the tissues absorbing the spray
- Functional elements that improve the utilization of the nutrients
- Stress-reducing compounds that enhance plant’s resistance against abiotic stresses, thereby maintaining its productive capacity.
3 Brands found

Designed for top performance in hard water conditions.
Peters Excel Acidifier stabilizes your growing media’s pH. Its high chelated trace-element levels give your crops outstanding color and growth, while our unique M-77 technology ensures maximum nutrient absorbability.
View Brand
Supplying calcium and magnesium in soft-water settings.
Peters Excel CalMag is designed especially for use in soft water, providing a steady supply of calcium and magnesium plus chelated trace elements. You gain both healthy plant growth and major cost-savings.
View Brand
Winning formulas for top-quality plants
Peters Professional fertilizers are the world’s leading fully water-soluble fertilizers. Our unique M-77 chelating formula gives you fast and easy nutrient and trace element uptake. It ‘unlocks’ the rooting area, so you get greater, more effective nutrient absorption than ever before. Whether you choose Peters Professional as a standard fertilizer or to solve a specific problem, you’ll always get a tailored, comprehensive fertilization plan.
View Brand26 Products found
0 Resources found



Our knowledge
Tips & tricks, disease prevention, crop and market related information
Explore our knowledge