Flowers attract butterflies and hummingbirds. Stems, branches and foliage are covered in dense, inconspicuous tomentose hairs. Solanum rantonnetii is a large shrub, growing 5 - 10 ft tall with glossy, vibrant green foliage. It is hardy in USDA zone 9 - 11 and may survive short cold temperatures in zone 8 with some protection. It requires full sun and dry conditions. The blue, lavender and purple flowers are very attractive and will attract butterflies and hummingbirds. The mature plant has cold hardy to at least 30s F for a short time.
When growing Solanum rantonnetii in cooler climates, it is best to Grow in a pot and bring it in during freezing temperatures. It should be planted in a well-draining, organic potting mix. During regular watering, allow the top of the soil to dry out between watering to prevent root rot. If growing the shrub in a pot in cold regions, a deep pot that can accommodate the root systems and multiple layers of insulation can be used to protect the roots from cold temperatures. Additionally, use a lightweight cover to provide insulation and to keep the plant protected from frost. Mulch the pot with leaves and hay or keep it in a sheltered area to avoid high winds and further cold temperatures.