Zinnias are typically known as annual flowers, meaning they complete their life cycle in one growing season. However, there are certain varieties of zinnias that can be grown as perennials, including the wild or prairie zinnia (Zinnia grandiflora) and its close relative, the Rocky Mountain zinnia (Zinnia grandiflora var. angustifolia).
I have personally grown wild zinnias in my garden, and they have proven to be long-lasting and reliable perennials. These plants have a mounded growth habit, reaching a height of 4-8 inches. They slowly spread through underground rhizomes, forming a beautiful and low-maintenance groundcover. The spreading nature of wild zinnias makes them ideal for filling in gaps in the garden or creating a carpet of color.
One of the reasons why wild zinnias can be considered perennial is their ability to withstand harsh conditions. They are native to the prairie regions of North America, where they have adapted to the hot and dry summers and cold winters. This resilience allows them to survive and thrive for multiple years, making them a great choice for gardeners looking for long-lasting plants.
In terms of care, wild zinnias are relatively low-maintenance. They prefer full sun but can tolerate some light shade. These plants are adaptable to various soil types, including sandy or rocky soils, which makes them suitable for a wide range of garden settings. However, they do require well-drained soil to prevent root rot.
Wild zinnias are drought-tolerant once established, but they will benefit from occasional watering during prolonged dry periods. It is best to water deeply and infrequently rather than providing frequent shallow watering. Overwatering can lead to root rot and other issues, so it’s important to find the right balance.
To promote continuous blooming and maintain a tidy appearance, deadheading spent flowers is recommended. This encourages the plant to produce more blooms and prevents the energy from being wasted on seed production. Additionally, dividing the plants every few years can help rejuvenate them and prevent overcrowding.
In terms of aesthetics, wild zinnias have small, daisy-like flowers in shades of yellow or orange. These vibrant blooms attract pollinators such as bees and butterflies, adding life and movement to the garden. The flowers are held on slender stems above the compact foliage, creating a delightful display.
While most zinnias are considered annuals, there are perennial varieties such as the wild zinnia and Rocky Mountain zinnia that can be grown in the garden. These plants offer a long-lasting and low-maintenance option, with their mounded growth habit and ability to spread through rhizomes. With their ability to withstand harsh conditions and attract pollinators, wild zinnias can be a valuable addition to any landscape. I highly recommend giving them a try if you’re looking for a beautiful and reliable perennial plant.
