The air in enclosed courtyards and urban walled gardens can feel humid and stagnant in summer. High walls, fences and dense planting can restrict air movement and create the perfect conditions for fungal disease, pest infestations and struggling plants.
Knowing how to increase airflow in a courtyard can make a significant difference to plant health, even if you just use these Fiskars bypass pruning shears on Amazon to thin out overcrowded stems. According to landscape designer Caroline Ervin, there are several visible signs that indicate that plants are not getting enough air circulation. 'The appearance of powdery mildew or mold is a very obvious sign that the air is stagnant. Additionally, the leaves of plants will curl or turn yellow if they are not getting enough air and oxygen around them,' she explains.
