Peters Professional Liquid S.T.E.M. Chelated
Best micronutrient supplement for professional growers needing quick, clog-free plant corrections.
Peters Professional Liquid S.T.E.M. Chelated is an industry-standard micronutrient supplement trusted for 50 years. This ready-to-mix liquid formulation is convenient and effective for all water types, ensuring no solubility issues. It provides an ideal balance of essential micronutrients, all readily available as chelates, to complement base nutrient formulations. Designed for easy application without clogging irrigation systems, it's perfect for quick corrections in ornamental plants and crops with micronutrient deficiencies. This fertilizer ensures 100% plant availability, supporting rapid growth and flower set during critical stages.
$156.81
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4425
#50 in Fertilizers
Price vs Category Average
+154%
Above average
Contains
0.130.1254.61.250.0150.6
/ Boron (B) %, Copper (Cu) % (chelated), Iron (Fe) % (chelated), Manganese (Mn) % (chelated), Molybdenum (Mo) %, Zinc (Zn) % (chelated)
Who it's for
- Gardeners managing challenging water quality or fluctuating pH levels
- Commercial growers needing seamless integration with automated irrigation systems
- Plant enthusiasts looking to rapidly revive yellowing or stressed foliage
Who should skip it
- Beginners seeking a simple all-in-one plant nutrition solution
- Budget-conscious hobbyists prioritizing low-cost, basic nutrient additives
- Careful users working near delicate surfaces or porous materials
Performance breakdown
System Compatibility
Clean liquid formula ensures irrigation lines remain completely clog-free.
Nutrient Bioavailability
Chelated trace elements guarantee immediate absorption for rapid plant recovery.
Mixing Convenience
Ready-to-mix liquid eliminates solubility headaches found in granular alternatives.
Water Versatility
Consistent performance across all water types regardless of mineral content.
Correction Efficiency
Highly concentrated blend provides rapid relief for acute micronutrient deficiencies.
Application Precision
Dye-free formulation allows for clean, professional-grade foliar application.
Key Specs
Contains
Boron (B) 0.13%, Copper (Cu) 0.125% (chelated), Iron (Fe) 4.6% (chelated), Manganese (Mn) 1.25% (chelated), Molybdenum (Mo) 0.015%, Zinc (Zn) 0.6% (chelated)
Derived from
Boric Acid, Copper EDTA, Iron EDTA, Manganese EDTA, Ammonium Molybdate, Zinc EDTA
Package Size
2.64 gallons
Formulation
100% plant-available blend of chelated trace elements and EDTA micronutrients
Water Type Compatibility
Effective for all water types
Fertilizer Source
Mineral Based
Application Method
Foliar Spray
Water Soluble
true
Features
- Goes from jug to tank easily
- No solubility issues
- Clean formulation won't clog lines
- Ideal for quick fixes
- Supports rapid growth and flower set
- Super-concentrated formula
- No-dye formulation
- Effective for all water types
What customers say
Growers consistently value Peters Professional Liquid S.T.E.M. for its exceptional quality and reliable performance. The primary insight is the product's efficacy; users report noticeable improvements in plant vigor and nutrient uptake, confirming its status as a high performance solution. Furthermore, the liquid formulation earns high marks for ease of use, mixing seamlessly into nutrient solutions. This convenience eliminates the solubility challenges common with powdered trace elements, making precision feeding straightforward and dependable for serious cultivation efforts.
Know before you buy
No. The liquid formulation is designed to be completely soluble, ensuring it flows through irrigation lines and spray nozzles without causing clogs or buildup.
Yes. Peters Professional Liquid S.T.E.M. is formulated to be effective across all water types, so you do not need to worry about water quality impacting the solubility or availability of the nutrients.
Chelation keeps the micronutrients in a stable, soluble form that plants can easily absorb. This ensures 100% plant availability, which is particularly helpful for correcting deficiencies quickly.
This is a micronutrient supplement designed to complement your base nutrient program. It provides the essential trace elements needed for rapid growth and flower set, but it should be used alongside a primary fertilizer.
This product is designed for foliar spray application. Its super-concentrated liquid form makes it easy to measure and mix directly into your tank for consistent coverage.
The formula is dye-free, which helps prevent staining on foliage or equipment. Because it is fully soluble, it leaves minimal residue compared to powder-based supplements.
Still have a question?
Ask Hayley anything about this product before you decide.