Summer Turf Management in Latin America: Strategic Watering, Mowing, and Nutrition

Strategic Watering Management for Summer Resilience

Summer in regions like Buenos Aires and other parts of Latin America presents unique challenges for turf maintenance. High temperatures, intense solar radiation, and occasional rainfall scarcity can severely stress turfgrasses, compromising their vigor and appearance. However, with a strategic approach and appropriate practices, it is possible to maintain a healthy and resilient green carpet throughout the summer season.

Efficient watering management is the cornerstone of turf survival in summer. It is recommended to prioritize deep, less frequent watering over shallow, daily applications. This encourages the development of longer, more robust roots capable of seeking moisture in deeper soil layers, increasing the plant’s tolerance to water stress. The optimal time for watering is early in the morning, before the sun reaches its zenith. This minimizes evaporation and allows the foliage to dry before nightfall, reducing the risk of fungal disease proliferation. The amount of water needed varies depending on soil type and turf species, but a general guideline suggests 25 to 30 mm of water per week, distributed over two or three sessions. Observing the turf is crucial: if the leaves begin to show a bluish tint or persistent footprints after being walked on, it is an indication of thirst.

Adjusting Mowing Height and Frequency for Summer Lawns

Mowing technique also becomes critically important during the warmer months. Raising the mowing height of the turf is a highly beneficial practice. Longer foliage provides greater shade to the soil, which helps reduce moisture evaporation and keeps the roots cooler. Furthermore, taller turf can photosynthesize more efficiently, accumulating energy reserves that will help it better withstand adverse conditions. It is suggested to maintain a mowing height of at least 5 to 7 centimeters (approximately 2 to 2.75 inches). Mowing frequency should be adjusted to the growth rate, which may slow down during periods of extreme heat or drought. It is essential to ensure that mower blades are always well-sharpened, as a clean cut minimizes damage to the leaves and overall plant stress. Leaving grass clippings on the ground, known as mulching, is an excellent strategy for returning nutrients to the soil and improving moisture retention, acting as a natural protective layer.

During summer, turf nutrition must be balanced and carefully managed. It is advisable to opt for slow-release fertilizers with a higher potassium (K) content and a lower percentage of nitrogen (N). Potassium is essential for strengthening plant cell walls, improving resistance to heat, drought, and diseases. Nitrogen applications should be moderate, as excessive and rapid growth can weaken the turf and make it more susceptible to stress. Avoid intensive fertilization during peak heat. Regarding pest and weed control, summer is a favorable time for the appearance of certain species. Early identification of weeds such as crabgrass (Digitaria sanguinalis) or pigweed (Amaranthus spp.) allows for more effective intervention, either manually or with selective herbicides, always applied with strict precautions. For pests like the fall armyworm (Spodoptera frugiperda) or grub larvae that affect roots, constant observation and the application of specific products, preferably biological ones, at the right stages of the pest’s life cycle, are key for integrated management. Well-aerated soil with good structure and drainage facilitates water and nutrient absorption, contributing to the overall health of the turf. Aeration, although often performed in spring or fall, can be beneficial in summer if the soil is heavily compacted, provided it is done during a period of less water and thermal stress for the plant.

Balanced Nutrition and Integrated Pest and Weed Management

Summer turf resilience is the result of a combination of well-executed cultural practices. Attentive observation of the signals the turf provides, adapting watering and mowing routines to specific climatic conditions, and mindful nutrition and pest control will allow for the enjoyment of a vibrant and healthy green carpet, even under the most intense sun. Consistency and technical knowledge are the most valuable allies for successful turf throughout the summer season.