Flowers

How to Plant, Grow, and Care For Wild Petunias

You are probably familiar with the colorful petunia flowers commonly sold as annuals at your local garden center. Did you know there are also wild petunias? In this article, gardening expert Liessa Bowen introduces these beautiful and easy-to-grow native wildflowers.

Wild....

petunia (Ruellia humilis) is a wonderful wildflower that you can add to just about any garden layout. These versatile flowers look great in containers and raised beds. They are equally at home in a cottage garden or larger naturalized areas.

These US-native flowering beauties have a long blooming period to liven up your garden throughout the spring, summer, and fall. They’ll also bring in the pollinators and attract plenty of attention from passers-by. They are medium-sized plants and just the right size to fit into any gardening theme.

These will reseed each year, so you’ll never be without a few wild petunias. If you are looking for a plant to come back reliably year after year, this is a great choice. You’ll only need one plant to start a population. Once you have a healthy plant, it’s easy to propagate and establish a healthy patch of these colorful flowers.

Now, let’s dig a little deeper to learn more about these wonderful plants and all the ways you can use them to enhance your home garden.
Plant Natural History
Wild petunia is native to much of the central and eastern United States, with the exception of the northern Great Plains States and New England. They grow naturally in prairies and glades, grasslands, along roadways, and along forest edges. In many places throughout their range, they are so common that they are considered to be roadside weeds and even naturally appear in lawns and gardens.

Wild petunias are part of the Acanthus family (Acanthaceae) which contains approximately 2500 species throughout the world. Most of these plants are from tropical regions, although some grow in temperate regions. The wild petunias of the genus Ruellia contain over 300 unique species of often colorful and ornamental plants.

Characteristics
Wild petunia is an herbaceous perennial wildflower. Each year, these plants form multi-stemmed clusters of upright, leafy stems topped with delicate-looking flowers. Dense clusters have an appealing rounded form.

The leaves are simple and grow as opposite pairs along the entire length of the stems. Each leaf is an elongated oval, measuring up to three inches long and one inch wide. The leaves stay solid green throughout the growing season and are slightly fuzzy to the touch, being covered with a fine layer of soft, downy hairs.

Flowers appear in late summer and persist throughout the summer and into mid-fall. The blooms are showy, with a thin, delicate appearance, but don’t let that fool you. These flowers are surprisingly tough, surviving full sun and other harsh conditions. Their pale lilac color is very attractive without being gaudy.

Each flower has a broadly open face with five petals, narrowing to a thin, trumpet-like tube at the base. Flowers frequently display darker purple stripes within the tubular openings. Individual flowers generally bloom for a single day and then drop off.

Propagation
It’s very easy to propagate wild petunias because they readily propagate themselves. Starting from scratch, you can obtain seeds and start your own plants. If you already have wild petunias in your yard, propagate your established plants by collecting seeds, taking stem cuttings, or dividing larger clusters. Do not dig or remove wildflowers from their natural habitats.
How to Grow
Wild petunias are easy to grow. These plants are highly adaptable and well-suited for many varied conditions. Make sure to offer them a location with plenty of sunlight and generally moist soil, and they should perform well with minimal trouble.
Maintenance

Wild petunias generally grow very well without regular maintenance. You will, however, end up with ever-increasing patches of petunias. Help keep your petunia patch looking great by thinning any unwanted seedlings each spring. This will allow more spacing between plants and allow them to look their best.