Preciosa Ornela presents a Glass Fertilizer that functions on the principle of the controlled release of phosphorus, potassium, calcium and magnesium. The main feature of this fertilizer is its ability to gradually release nutrients that are important for plant growth and vitality over a period of up to three years.

Composition: 
Phosphorus 14 per cent P2O5 (6.2 per cent P)
Potassium 31 per cent K2O (25.7 per cent K)
Calcium 19 per cent CaO
Silicon 28 per cent SiO2

Trace elements: Iron, Manganese, Copper and Molybdenum

Main features
A balanced ratio of Phosphorus, Potassium, Calcium and Magnesium - a balanced ratio of P, K, Ca, Mg and the trace elements that are necessary for plant health.

A regular and even supply of nutrients.

Managed release over a period of one to three years (in accordance with type of fraction) - the only glass fertilizer in the Czech Republic, a substantially longer active period than conventional fertilizers.

No surface water contamination - the controlled release of the nutrients only during the vegetative period does not lead to any surface water contamination. 30 to 40 per cent of the nutrients from regular fertilizers are washed into the surface water, leading to environmental pollution.

It blocks the affects of soil salinization - the high potassium level blocks the effects of soil salinization during winter road salting.

Desigend for perennials - it has been designed for use with perennial plants/trees that do not require significant amounts of potassium, for example, fruit and ornamental trees, shrubs, municipal parks, green roofs, forest tree species, …

It helps plants do better during droughts. 

Glass Fertilizer has been developed in cooperation with the Silva Tarouca Research Institute for landscape and ornamental.