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Apply 1–2 oz. per 1,000 sq. ft. every 7–14 days or 3 oz. per 1,000 sq. ft.

Increase rate and water-in application when treating unfavorable soil conditions, but do not exceed 8 oz. per 1,000 sq. ft. per application.

Package Sizes:

4 x 5 liter (5.28 US gallons) case

120 liter (31.7 US gallons) drum


Calcium where you want it, when you want it.

Calcium is a critical element in the formation of plant cell walls. That is why adequate levels of available calcium help provide a strong turf that can stand up to heavy play and mechanical damage. Unfortunately, plant tissue can easily become calcium deficient, even in soils with adequate calcium levels. 

Quelant-Ca is formulated with a balanced proportion of calcium and free amino acids to aid in the prompt absorption within the plant. With Quelant-Ca in your fertility program, you can quickly correct and maintain the calcium levels in your turf, even during times of plant stress.

Product at a Glance: 

  • Delivers 5.7% calcium combined with Macro-Sorb’s advanced L-amino acids for maximum spray application effectiveness.   Learn more about Quelant technology.

  • Readily available calcium is easily absorbed by leaves and roots

  • Improves photosynthesis, which increases tolerance to disease and environmental stress

  • Pharmaceutical grade manufacturing process guarantees consistent ratios of L-amino acids.  Learn more about the manufacturing process.

  • Prevents and controls calcium deficiency to maintain leaf turgidity and quality

  • Tank mix compatible with most normally-used agrochemical products 

  • Fortified with boron to maximize calcium utilization by the plant. Learn more about the technology.

Quelant-Ca Uptake Vs. Calcium Nitrate

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Plant calcium concentrations following applications of Quelant-Ca at two rates (0.5 and 0.75 lbs calcium/Acre) and calcium nitrate (1.5 lbs calcium/Acre). Notice how the amino acid complexed calcium found in Quelant-Ca can be applied at lower rates, while increasing plant calcium levels beyond that of a higher rate of basic calcium nitrate. 

Quelant-Ca Increases Calcium Concentration in Leaf Tissue

Figure 1

Figure 2

Tall fescue plants were treated with Quelant-Ca at the rate of 2.0 fl oz/1000 ft2 on 10 day intervals for a total of 4 applications.  Untreated plants were used to compare levels of calcium throughout the study. Tissue samples were collected and analyzed 24 hours after initial applications, and 5 weeks after the final application.


At just 24 hours after initial applications of Quelant-Ca, calcium leaf concentrations increased 18% compared to the untreated control (Figure1.). Calcium concentrations continued to increase after each application, and remained much higher than the untreated control even 5 weeks after the final application (Figure 2.). 

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