Strobilanthes, commonly known as Persian Shield, is a stunning plant that is highly valued for its vibrant purple foliage. It is native to Myanmar (formerly Burma) and is often grown as an annual in many regions. However, in warmer climates, it can be a perennial and come back year after year.
In terms of hardiness, Strobilanthes is typically classified as winter hardy in USDA Zones 9-11. This means that it can withstand the cold temperatures and survive the winter in these zones. However, it is important to note that its root hardiness may extend to Zone 8, meaning that the roots can survive in this zone but the foliage may die back.
In my personal experience, I have seen Strobilanthes thrive as a perennial in Zone 9, where I live. The plant has been able to withstand mild winter temperatures and regrow from its roots in the spring. It adds a beautiful burst of color to the garden year after year.
However, in colder regions where the temperatures drop below freezing for extended periods, Strobilanthes is often grown as an annual bedding plant. This means that it is planted in the garden each spring and removed or replaced in the fall before the first frost. This ensures that the plant does not get damaged by the cold and can be enjoyed as a seasonal beauty.
Another option for colder regions is to grow Strobilanthes in pots or containers. By doing so, you have the flexibility to bring the plant indoors during the winter months and overwinter it as a houseplant. This way, you can enjoy its colorful foliage year-round and potentially even propagate it to have more plants in the following year.
To summarize, while Strobilanthes can be a perennial in warmer climates (Zones 9-11), it is often grown as an annual in colder regions or as a container plant that is overwintered indoors. Its ability to come back every year depends on the specific climate and growing conditions. Nonetheless, whether it is a perennial or an annual, Strobilanthes never fails to make a bold statement with its vibrant purple foliage.
