• elemental
Nitrogen Total (N) 20%
Nitrate nitrogen (N03-N) 7.0%
Ammoniacal nitrogen (NH4-N) 12.8%
Phosphorus (P) 2.6%
Water soluble 2.6%
Potassium (K) 8.3%
Water soluble 8.3%
Magnesium (Mg) 1.2%
Water soluble 1.2%
Iron (Fe) 0.06%
Water soluble 0.06%
Chelated by EDTA 0.06%
Manganese (Mn) 0.04%
Water soluble 0.04%
Chelated by EDTA 0.04%
Boron (B) 0.01%
Water soluble 0.01%
Copper (Cu) 0.010%
Water soluble 0.010%
Chelated by EDTA 0.010%
Molybdenum (Mo) 0.001%
Water soluble 0.001%
Zinc (Zn) 0.010%
Water soluble 0.010%
Chelated by EDTA 0.010%

Universol Opal High N

Opal High N


  • Prouduct Feature
  • Recommended rates
Prouduct Feature

Universol Opal is suitable during the main growth phase or when there's nitrogen deficiency. 

• High nitrogen formulation
• Ammonium-N
• Chelated trace element package
• Fast and complete solubility
• No residues in the stock solution
• Low dust
• Low in chlorine

Recommended rates

Recommended Universol rates for pot and bedding plants


100 % Universol

50 % Universol

50 % Osmocote

High Rate

1-2 g/l

0.5-1 g/L

Normal rate

1-1.5 g/l

0.5-0.75 g/L

Low rate

0.5-1 g/l

<0.5g/L or varies depending on situation


Recommended Universol rates for container nursery stock crops

High Rate

20 g/m2/week

10 g/m2/week

Crops with normal fertilizer requirements

15 g/m2/week

7.5 g/m2/week

Salt sensitive crops

10 g/m2/week

5 g/m2/week

Trial first on a small scale before rate, application or other changes in your cultural practices are implemented. As circumstances can differ and as the application of our products is beyond our control, ICL cannot be made responsible for any negative results. Always ask your ICL advisor for the best results.
Store under dry conditions. Partly used or damaged bags should be closed well.

Universol Opal High N is an ammonium-based, fully water-soluble fertiliser with a high N: K ratio. Universol Opal excels during the vegetative growth phase of many crops or to remedy nitrogen deficiency. Universol Opal contains mainly ammonium nitrogen, which is the preferred nitrogen source for crops such as blueberries. The inclusion of magnesium and a complete trace element package ensures excellent performance on a wide range of crops.