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Summer turf fertilization

03 June 2025 - Turf care

THERMO – Professional high-potassium fertilizer for summer turf management

In the field of technical turf nutrition, managing climatically stressful periods is one of the most complex challenges for green space professionals. With high temperatures, reduced water availability, and slowed metabolic activity in cool-season grasses, having a targeted nutritional tool to prevent and mitigate summer stress damage becomes essential. This is where THERMO, a professional granular fertilizer from the TURF-ON line by Green Europe Comagricola, comes into play.

Technical profile: a concentrate of agronomic functionality

THERMO features a formulation of 8-0-30 + 4Mg, where each nutrient plays a specific physiological role:

  • Total nitrogen 8%, entirely in methylene urea form (CRF – Controlled Release Fertilizer): ensures a prolonged and uniform release of mineral nitrogen, aligning with the slower summer growth rate of grasses without promoting excessive vegetative growth or encouraging fungal diseases.

  • Zero phosphorus: an agronomic choice aimed at avoiding stimulation of weed germination and development, often favored by assimilable phosphates in the soil.

  • Potassium (K₂O) 30%: the K⁺ ion is crucial for resistance to heat and drought stress. It regulates stomatal opening, cell turgor, water conductance, and the synthesis of compatible solutes (osmoprotectants). High potassium levels applied before and during the summer months help improve leaf resilience and maintain tissue osmotic balance.

  • Magnesium (MgO) 4%: a key structural component of the chlorophyll molecule. It supports photosynthesis even when leaf efficiency is reduced due to high temperatures.

  • Sulfur trioxide (SO₃) 26%: enhances the absorption of other macro- and meso-elements and contributes to ionic balance in the rhizosphere.

Application strategy: prevention and physiological support during critical periods

THERMO is designed for use immediately before and during the most climatically challenging periods—typically from late May to September, depending on latitude and turf use.

Particularly recommended for:

  • Residential and corporate ornamental lawns

  • Cool-season sports turf (e.g., Poa pratensis, Festuca arundinacea)

  • Public green spaces subject to heavy foot traffic

Its fine granulation allows for uniform and precise distribution using either professional spreaders or handheld tools on smaller areas. Application should be made to dry turf followed by light irrigation to activate nutrient availability.

What makes THERMO unique: more than just an NPK

What sets THERMO apart in the professional landscape is not just its composition, but the balance between nutrient release, biochemical selectivity, and protective function. Its zero-phosphorus formulation makes it ideal where summer weed control is a management priority. The high potassium content, in synergy with magnesium, works deeply within the plant’s physiology, encouraging a systemic adaptive response and enhancing turf tolerance to extreme environmental conditions.

For all green space professionals seeking a technical ally for summer turf management, THERMO is a safe choice aligned with the most advanced European agronomic strategies. It is the ideal solution for those looking to preserve the aesthetic and functional quality of turf even in the most critical months—without compromise.

Usage