Hello. As far as phytosanitary treatments are concerned, since ornamental plants can be affected by numerous pathogens (unlike certain vegetables or fruit trees where specific pests and diseases can be listed) and their attack is unpredictable, preventive spraying is often ineffective. Thus, in general, ornamental plants are checked periodically, with treatments being applied only when pests or disease symptoms are observed. In such cases, it is advisable to consult specialist advice from the first signs of disease.
It is known that plant pathogens occur and cause damage primarily in weak, poorly developed plants, advancing to healthy and vigorous plants only in the case of mass multiplication (when no measures are taken at the onset of the attack and there are sufficient hosts for the pest/disease). Vigorous plants that benefit from optimal environmental conditions and care are rarely affected by diseases or pests. Thus, it is recommended to ensure optimal growing conditions for your ornamental plants (Thuja, planting guide and care work). Considering that the activity and propagation of plant pathogens is stimulated by a high and constant humidity of the soil, watering is recommended to be carried out exclusively at the roots, depending on the recorded temperatures and rainfall, only when the soil is dry on the surface. Adequate fertilizing is also essential to ensure their healthy growth and development. The main purpose of root fertilizers is to improve the fertility, texture and structure of the soil, thus stimulating the optimal uptake of nutrients from the ground and therefore the growth of plants (e.g. or ). Foliar fertilizers prevent deficiencies, improve the photosynthesis process and contribute to chlorophyll biosynthesis, stimulate a healthy growth and improve the resistance of plants to physiological stress, diseases and pests (e.g. or ). During the growing season, a root fertilizer and a foliar fertilizer can be applied regularly, following the recommendations in the description of the chosen products.