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Plant nutrition and biostimulant technology that strengthens crops from the inside out — supporting nutrient uptake, stress tolerance, and yield potential.
Plant-available potassium, powered by Quatro
Purple Tag delivers plant-available potassium for stronger stems, better water regulation, and higher yield potential — enhanced by Quatro technology to help unlock faster potassium uptake and support plants through stress.
Guaranteed Analysis
2% Nitrogen, 8% Potassium — derived from potassium nitrate
Product Rate
3–8 gal per acre per application for most crops — see the label for the full crop-by-crop table
Application
Soil application — broadcast, surface banded, or through drip irrigation during the growing season. Shake well before use.
Stimulates growth of fruit, seeds, and tubers
Potassium drives the processes that show up at harvest — stem strength, water regulation, and fruit development. Purple Tag makes it easy to sustain ideal potassium levels or correct deficiencies, providing sustained potassium nutrition at the key reproductive stages when demand peaks. Quatro technology works alongside to help unlock faster potassium uptake, mitigate plant stress, and enhance fertilizer efficacy.
Key Crops
Walnuts
Almonds
Leafy Greens
Citrus
Product Highlights
Enhanced by Quatro technology.
For the full crop-by-crop application table, see label.
Everything you need to put Purple Tag with Quatro to work — grab the downloads below, or reach out for a sample and program guidance.
Plant-available calcium, supercharged by Quatro
Guardian Calcium delivers the plant-available calcium crops need for stronger cell walls, better fruit quality, and disease resistance — supercharged by Quatro, which helps unlock faster, more efficient calcium uptake and stress recovery right when plants need it most.
Guaranteed Analysis
5% Nitrogen, 7% Calcium — derived from calcium nitrate
Product Rate
3–8 gal per acre per application for most crops — see the label for the full crop-by-crop table
Application
Soil application — broadcast, surface banded, or through drip irrigation during the growing season. Shake well before use.
Stronger cell walls, better fruit quality, disease resistance
Calcium builds the cell walls that decide how fruit ships, stores, and sells. Guardian Calcium delivers plant-available calcium for stronger cell walls, better fruit quality, and disease resistance — and Quatro helps unlock faster, more efficient calcium uptake and stress recovery right when plants need it most.
Key Crops
Walnuts
Almonds
Leafy Greens
Citrus
Product Highlights
Supercharged by Quatro.
For the full crop-by-crop application table, see label.
Everything you need to put Guardian Calcium with Quatro to work — grab the downloads below, or reach out for a sample and program guidance.
Transform potential into performance
TransfEr delivers a concentrated phosphorus-potassium blend engineered to fuel root development, boost stress tolerance, and drive stronger yields — the nutrient foundation your crops need to transform potential into performance.
Product Rate
Rates vary by crop and growth stage — refer to the product label. Full label coming soon; contact us for current rate guidance.
Usage
Use to fuel root development, boost stress tolerance, and build the nutrient foundation for stronger yields.
Stronger root systems, stronger yields
TransfEr delivers a concentrated phosphorus-potassium blend engineered to fuel root development, promote strong plant cell growth, and balance soil salinity — the nutrient foundation your crops need to transform potential into performance. Quatro technology works alongside to help mitigate plant stress and enhance fertilizer efficacy.
Key Crops
Walnuts
Almonds
Leafy Greens
Citrus
Product Highlights
The foundation for performance.
Everything you need to put TransfEr with Quatro to work — grab the downloads below, or reach out for a sample and program guidance.
Tell us about your operation and we’ll connect you with the right solution.
