Hello. The symptoms of deterioration are similar to those caused by the action of abiotic factors, such as stress from transport, handling, changing environmental and planting conditions, sunburn, strong dry winds, drought and other unfavorable conditions – the disorder is known as leaf scorch. It is known that the chance of success in the case of seedlings is lower for larger specimens (Ornamental trees and shrubs - Planting guide).
To improve the aesthetic appearance of the maple, you may consider removing heavily affected leaves. In view of recent planting, to improve the quality of the soil, to stimulate root expansion and to increase the plant’s resistance, you may consider using a fertilizer specially formulated for this purpose, such as or (only one application during this period, according to the instructions on the label of each product). After an interval of 2-3 weeks, a fertilizer with a high potassium content, such as , can be administered by spreading around the tree in a dose of 20 – 30 g/m², followed by incorporation and watering. This fertilizer increases drought and frost resistance and improves the water balance of the trees. In the future, to ensure the healthy growth of maple trees, you can take into account the detailed advice on the care of these plants from this article: Maple, planting guide and care work. From spring onwards, you can consider resuming the application of a root fertilizer ( or ) or the regular use of a foliar fertilizer such as , or , applied by foliar spraying, according to the instructions in the product description.
In view of the current condition of the maple and the above mentioned, it is not possible to say exactly how it will develop in the future.