Mackenzie's Willow prefers consistently moist soil. Water deeply when the top few centimeters of soil feel dry. Avoid waterlogging, especially in winter.

Adequate moisture is crucial for its establishment and vigorous growth, particularly in warmer months. Reduce watering slightly during dormancy.

Prune Mackenzie's Willow in late winter or early spring before new growth begins. Remove dead, damaged, or crossing branches. Pruning can also be used to shape the plant or control its size.

Willows respond well to hard pruning, which can rejuvenate older specimens.

Stem cuttings are the most common method for propagating Salix prolixa. Take 6-12 inch cuttings from current season's growth in late summer or early autumn.

Remove lower leaves and insert the cut end into moist potting mix or directly into the ground. Rooting is typically successful.

Repotting is generally not necessary for established Mackenzie's Willows, as they are typically planted directly in the ground. For container-grown specimens, repot every 2-3 years in early spring into a slightly larger pot with fresh, well-draining potting mix to accommodate root growth and prevent root-bound conditions.