Aspen trees prefer consistently moist soil, especially during their establishment phase in the first few years after planting. Water deeply and regularly, ensuring the soil doesn't dry out completely between waterings. Once established, they develop a good drought tolerance but will benefit from supplemental watering during prolonged dry spells, particularly in hotter climates. Avoid waterlogging, as this can lead to root issues. Monitor soil moisture carefully.

Pruning for Populus tremula is typically minimal, focusing on maintaining a strong structure and removing dead, diseased, or damaged branches. The best time for structural pruning is in late winter or early spring before new growth begins. Remove any crossing branches or those rubbing against each other to prevent future issues. Aspens are prone to suckering from their roots; these suckers should be removed regularly to maintain a tidy appearance and prevent unwanted spread.

Populus tremula can be propagated through several methods. The most common natural method is by root suckers, which readily emerge from the parent tree's root system and can be carefully dug up and transplanted. Hardwood cuttings taken in late autumn or winter are also effective; these should be about 20-30 cm long and planted directly into moist soil. Seed propagation is possible but less common for home gardeners due to variable germination rates and slower growth.

Repotting is generally not applicable for Populus tremula as it is a large tree typically grown in the ground. It is not suitable for long-term container cultivation due to its extensive root system and mature size. If a young sapling is temporarily grown in a pot, it should be transplanted to its permanent ground location as soon as possible, ideally within one to two years, to allow for proper root development and growth.