Western Serviceberry requires consistent moisture during its establishment phase, typically the first one to two years. Once mature, it exhibits good drought tolerance but will benefit from supplemental watering during prolonged dry periods, especially when the plant is setting and ripening fruit. Ensure well-drained soil to prevent waterlogging.

Prune Western Serviceberry in late winter or early spring while the plant is dormant. Focus on removing any dead, damaged, or diseased branches, as well as those that cross or rub. Thin out older, less productive stems from the base to encourage vigorous new growth and improve air circulation within the canopy. This practice maintains plant health and promotes better fruit yield.

Amelanchier alnifolia can be propagated from seeds, which require a period of cold stratification to germinate effectively. Softwood cuttings taken in early summer can also be rooted, though success rates vary. Additionally, the plant often produces suckers from its base, which can be carefully divided and transplanted to establish new plants.

As a large shrub or small tree, Amelanchier alnifolia is primarily grown in the ground and not typically repotted. If cultivated in a very large container, which is uncommon, repotting might be considered every few years to refresh the soil and inspect root health, but it's generally not a standard practice for this species.