Crystal Green® is the first continuous release granular fertilizer to provide Root-Activated™ phosphorus to feed plants in one season-long application.
Unlike conventional phosphate fertilizers, which release nutrients upon watering or irrigation, Crystal Green® releases nutrients in direct response to root demand- when the plant releases organic acids, Crystal Green® releases nutrients. This results in a steady source of phosphorus (along with nitrogen and magnesium) throughout the growing season.
How it Works
Crystal Green® is sustainably produced by Ostara using nutrient recovery technology that combines phosphorus, nitrogen, and magnesium into pure crystalline granules. By adding Magnesium to nutrient rich water sources in a pH controlledenvironment, nutrients crystalize to form struvite (5-28-0-10Mg), like scale in a kettle.
Crystal Green® is virtually water insoluble and releases only in response to organic acids produced by growing roots. As the roots produce citrates, Crystal Green® responds with a healthy release of phosphorus, fertilizing plants on demand. As plant demand decreases, nutrient release from Crystal Green® is reduced consequently providing a more consistent feeding of nutrients compared to conventional phosphorus fertilizers. Crystal Green®’s unique mode-of-action increases fertilizer efficiency and minimizes nutrient loss.
Guaranteed Minimum Analysis
Total Nitrogen (N)
Available Phosphate (P2O5)
Studies show an average recommended rate of 25% of the total phosphorus as Crystal Green, with rate variances depending on crop and soil type. Example: If a grower used 40 pounds of actual P on Canola, 10 pounds of the 40 should come from Crystal Green®.
Blending Attributes Crystal Green vs Crystal Green Pearl
Bulk Density (lbs per ft²)
Angle of Repose
Granules per lbs
2000 lbs totes/bulk
2000 lbs totes
Root-Activated™ Nutrient Technology- Crystal Green® employs a citrate soluble mode of action which means it releases nutrients in response to plant’s organic acid production. This allows Crystal Green® to gradually release nutrients into the soil solution when the roots need it most.
Season-Long Plant Availability- Continuous release provides plant-available nutrients all season long while minimizing nutrient tie-up, leaching, and runoff.
Consistent, Dependable Release- Crystal Green’s® nutrient release is dependent on plant demand; not on coatings, soil temperatures, microbes, or pH.
Significantly reduced risk of leaching and runoff;
Derived from a sustainable and renewable source
Helps protect sensitive local waterways
Significantly reduces the risk of salt injury in Canola. With only one-quarter of the salt index found in MAP fertilizers, Crystal Green® provides the steady supply of phosphorus canola needs to thrive – while significantly reducing risk of seedling injury. The result is increased stand count and yield. Results from four 2016 Manitoba field trials reveal an average 14.65% higher stand count*/m in fields treated with Crystal Green® compared to Grower Standard Practices.
* Crystal Green® Effects on Stand Count (per square meter) Southern Manitoba Canola Trials 2016
Monoammonium Phosphate (MAP)
Diammonium Phosphate (DAP)
77% of applied phosphorus from Crystal Green® is taken in by the plants in the year of application
Increasing marketable yield of potatoes in challenging pH soil. In Canada, Crystal Green® blends have outperformed its potato grower’s standard fertilizer program by 41 cwt/acre on average. Due to its citrate solubility, Crystal Green’s® unique Root Activated™ release delivers phosphorus and magnesium when – and only when – the plant needs it.