Published : 08/31/2026

Green Calendar for September 2026

By : Davide - Categories : Lawn care

COOL-SEASON GRASSES

September is the best time for sowing and overseeding because autumn rains and soil moisture are generally preferable at this stage, soil temperatures drop to ideal values for germination, and daylight hours decrease, favoring the second phase of annual vegetative recovery.

During the month of September, meadows grow, form new tissue and consume nutrients and energy; this is the time of the so-called vegetative recovery.

A good maintenance worker must absolutely meet these needs through nutrition, providing all the essential elements and re-establishing the correct reserve reserves to face future periods of stress.

WARM-SEASON GRASSES

With September, we enter the final phase of the summer season, and in warm-weather lawns, the pace changes because the nitrogen input must be more moderate, with the necessary differences between North and South, where temperatures can still remain high and vegetation lush.

It is essential to start adding noble organic substances, amino acids and peptides, to accumulate sugars in the rhizomes.
On the one hand, we ensure the right energy support for the metabolism of warm-season grasses plants, while on the other, we prepare for the slowdown that precedes the autumn-winter dormancy, ensuring sugar reserves for an excellent greenup in the next season.

We therefore raise the cutting height, reduce irrigation, change the support fertilizer and use the special liquid products from the Zollaverde Macro line.

In some areas of the North, or on sports fields, we can consider overseeding with specific seasonal species to make the most of the lawn during dormancy, or we can accompany the warmer grasses with their natural winter yellowing.

September is therefore a crucial month for best managing our warm-season lawns!

INDEX

1. COOL-SEASON GRASSES
2. WARM-SEASON GRASSES
- 2.1. GRANULAR AND LIQUID FERTILIZERS FOR WARM-SEASON GRASSES

1.1. LAWN SEEDS
	ROYAL BLUE PLUS Treated seed 90% Tall Fescue 10% Poa pratense Resistance to drought and salinity, thermal extremes, the main pathologies, trampling and even partial shade has been developed. Leaf texture: narrow. Color: dark. Dosage: 45-50 g/m2
	ROYAL STRONG PLUS Treated seed 100% Festuca arundinacea High resistance to stress, with production of rhizomes and very high tillering capacity. Also ideal for overseeding. Leaf texture: medium. Color: dark. Dosage: 45-50 g/m2
	ROYAL MOON For ornamental lawns in shaded areas, designed to ensure high resistance, dense coverage and an intense green colour even in low light. 70% Tall Fescue 10% Sheep fescue 10% Red Festuca 10% Festuca rubra commutata Leaf: fine Color: dark Dosage: 45-50 g/m2
	ROYAL PARK 70% Tall Fescue 30% Perennial ryegrass Also ideal for overseeding. Excellent tolerance to drought and disease. It requires low maintenance. High settlement speed. Leaf: medium Color: dark Dosage: 45-50 g/m2
	ROYAL FLOWERS 30% Red Festuca 15% Sheep fescue 45% Perennial ryegrass 10% Poa pratensis + low-cut flowering mix Bottos mix combines ornamental grass and persistent flowers to create a natural, hardy lawn that promotes biodiversity. Leaf texture: narrow. Color: bright. Dosage: 25-30 g/m2
1.2. GRANULAR FERTILIZERS
	PERFECT LIFE 18-5-10 + 2 MgO + 0.5 Fe + Mn + Zn Vegetative boost fertilizer with a balance between lawn nutrition and soil needs with a special natural integrated mycorrhizal inoculum. Significant improvement in the biofertility of substrates. Duration of assignment: 6-10 weeks. Dosage: 20-35 g/m2.
	SLOW GREEN 22-5-10 + 2 MgO Vegetative boost fertilizer containing 35% slow-release and programmed-release nitrogen. Transfer duration: 6-8 weeks Dosage: 25-35 g/m2
	SUPER TURF 22-0-9 + CharX Fertilizer with 60% nitrogen fraction controlled by Polyon which allows its use even in late spring. Suitable for robotic cutting. Duration of assignment: 10-12 weeks Dosage: 30-35 g/m2
	BIOSTART P 12-20-15 Starter fertilizer based on phosphorus with the addition of humic acids to speed up germination and improve mineral absorption. Duration of assignment: 8-10 weeks. Dosage 30-40 g/m2.
1.3. PHYTOFORTIFIERS, BIOSTIMULANTS AND LIQUID FERTILIZERS
	SAFE Mn EDTA + Zn EDTA Phytofortifier based on Manganese and Zinc. Resistance inducer and restoration of the microelement chain. Dosage: Foliar: 10-20 g/100 m2 diluted in 5-10 litres of water. Radical: 15-30 g/100 m2 diluted in 10-20 litres of water.
	GREEN UP 16-0-0 + 3.5 Fe Nitrogen fertilizer with greening and acidifying action and helps control moss. Dosage: Foliar: 200-400 g/100 m2 diluted in 5-10 litres of water. Radical: 300-500 g/100 m2 diluted in 10-20 litres of water.
	HELP 10-5-7 + MICROELEMENTS Lawn vegetation recovery. Color effect and micronutrient restoration. Dosage: Foliar: 250-400 g/100 m2 diluted in 5-10 litres of water. Radical: 250-500 g/100 m2 diluted in 10-20 litres of water.
	PRE-STRESS Natural organic complex based on marine algae. Prevents stress and helps the lawn. Dosage: Foliar: 60 g/100 m2 diluted in 5-10 litres of water. Radical: 150-200 g/100 m2 diluted in 10-20 litres of water.
1.4. BIOACTIVATED
	TRYKO PLUS + POWER LIQUID Mycorrhizal fungi inoculum helps control fungal lawn diseases. Dosage: Radical: 25-30 g/100 m2 diluted in 10-20 litres of water.
	THUR + POWER LIQUID Integrated mycorrhizal inoculum for the parasitization of harmful insect larvae, particularly Lepidoptera and mosquitoes. Dosage: Radical: 25-30 g/100 m2 diluted in 10-20 litres of water.
	FLY + PRE-STRESS Integrated mycorrhizal inoculum containing Beauveria, Metharizums and Lecanicillium. Preventive liquid treatment with a barrier effect against insects that are harmful to the lawn. Dosage: Radical: 25-30 g/100 m2 diluted in 10-20 litres of water.
2.1. GRANULAR AND LIQUID FERTILIZERS FOR WARM-SEASON GRASSES
	COLD TIME 4-3-8 + 2 MgO Prepares for winter and reduces stress, facilitating spring growth. It contains “noble” organic substance, organic nitrogen derived from plants, promotes winter resistance, and has a high potassium content. Duration of assignment: 10-12 weeks Dosage: 50-60 g/m2
	STRONGER 11-0-11 + Fe Balanced slow-release fertilizer with chelated iron. Density, color and thrust for warm-season grasses essences. Dosage: Foliar: 150-400 g/100 m2 diluted in approximately 5-10 litres of water. Radical: 250-600 g/100 m2 diluted in approximately 8-10 litres of water.
	PROMOTER Naturally derived biostimulant rich in amino acids and secondary metabolites. It falls into the category of probiotics, for the defense and colonization of spaces. Dosage: 50-250 g/100 m2 diluted in approximately 8-10 litres of water