Light
Full sun will produce the best foliage color, but the shrub will tolerate some shade and may prefer shade in very hot climates.
Soil
This plant likes moist but well-drained soil that has ample organic material.
Water
The question of how often to water a flamingo willow doesn’t really apply. The tree can only grow in a wetland or marsh area, where it will get all the water it needs. In dry soils, apply a thick layer of mulch to help retain soil moisture.
Temperature and Humidity
Best foliage color will be achieved in cooler climates north of zone 7. This plant tolerates a wide range of humidity levels.
Fertilizer
Willows don’t need any additional fertilizer.
Types of Flamingo Willow
Flamingo willow bears a close resemblance to several other willow species used in landscape applications. Remember, though, that these are plants that should not be used around septic systems, underground pipes, etc. The best-known related species include:
Weeping willow (Salix babylonica), is a fast-growing, medium-to-large tree often planted around bodies of water. Pussy willow (Salix discolor), is a classic willow shrub that is considerably larger than flamingo willow. It is often grown for its decorative catkins. Rosegold pussy willow (Salix gracilistyla) is similar to S. discolor but has catkins that turn pinkish, then orange, then yellowish. Goat willow (Salix caprea) is an old-world version of North America’s pussy willow. It is a large shrub or small tree, depending on how it is tended. White willow (Salix alba) is quite a large tree, growing to 50 to 80 feet. Coral bark willow (Salix alba subsp. vitellina ‘Britzensis’) is a cultivar of white willow with stems that are orange-red in late winter. Uncontrolled, it can grow to 80 feet, but it can be controlled with frequent pruning.
Pruning
To achieve the best color, maintain the following pruning regimen:
Prune heavily in early spring, when still dormant. This will create the best leaf color.Prune again in late spring to early summer.Prune again in August.
Cut 1/3 of the older branches right down to the ground in spring, and trim back the top growth (1 foot or so) on the remaining branches. The goal is to stimulate new growth, which will let you enjoy the red stems in winter and good variegated leaf color in the spring.
Propagating Flamingo Willow
Like all willows, flamingo willow is very easy to propagate:
How to Grow Flamingo Willow From Seed
Since flamingo willow is so easy to grow from cuttings and quite difficult to grow from seed, most gardeners simply find cuttings from fellow gardeners or reach out to their local nursery or horticultural society.
Common Pests and Plant Diseases
A variety of diseases can affect willows, including blights, crown gall, powdery mildew, leaf spots, scab, rust, and cankers. Treatment of these diseases can include removing the affected areas or using a fungicide, where appropriate. Insect pests include aphids, scale, borers, lace bugs, beetles, and caterpillars. Though some of these can be handled with chemical or organic treatments, others—such as caterpillars—are best removed by hand. The Salix integra species includes one other popular cultivar in addition to the flamingo. Dappled willow (Salix integra ‘‘Hakuro-nishiki’) is a very similar plant to the flamingo. The flamingo willow is a sport of the dappled willow, achieved by propagating a genetic mutation of the dappled willow. The growth habit of the dappled willow is identical to the flamingo, but it lacks the tri-colored foliage.