Purple Blossoms Unwanted: A Guide to Common Weeds with Purple Flowers

Weeds are generally considered undesirable in gardens, but some of them can be quite attractive, especially those that produce purple flowers. These weeds, though visually appealing, can spread quickly and might overtake cultivated plants if left unchecked. This article delves into some common types of weeds with purple flowers, exploring their unique characteristics and why they might appear in your garden.

Henbit Deadnettle (Lamium amplexicaule)

Henbit deadnettle is a common annual weed that blooms with distinctive purple flowers in the spring. The flowers are tubular and grow in clusters, providing a stark contrast to the green leaves.


Henbit deadnettle has rounded, green leaves that are often crinkled at the edges. The plant can grow up to 16 inches tall and has square stems. Its flowers are rich purple and typically attract pollinators like bees and butterflies.

Growth Habit

This weed prefers cool weather and moist soil, often appearing in gardens, fields, and even along roadsides. It spreads through seeds, and if left to grow unchecked, it can cover large areas quickly.

Purple Deadnettle (Lamium purpureum)

A relative of the henbit deadnettle, the purple deadnettle is also a common weed found in various landscapes. It’s distinguished by its leaves that appear to have a purple tinge.


Purple deadnettle has triangular leaves with a reddish-purple hue, especially as they mature. The purple flowers are small and grow in clusters. They are similar in shape to those of the henbit deadnettle but tend to be a bit paler.

Growth Habit

Growing in similar environments as its relative, purple deadnettle also prefers cool, damp conditions. It can quickly spread through seeds and may become a nuisance if not controlled.

Wild Violets (Viola spp.)

Wild violets are perennial weeds that can be found in many gardens. Though some gardeners appreciate their beauty, others find them invasive.


Wild violets have heart-shaped leaves and delicate purple flowers, often with a white center. Some varieties may have white or blue flowers, but purple is the most common.

Growth Habit

Preferring shady, moist areas, wild violets can spread through both seeds and underground rhizomes. This dual method of propagation allows them to cover a significant area if not managed properly.

Creeping Charlie (Glechoma hederacea)

Creeping Charlie, also known as ground ivy, is a notorious weed that produces small purple flowers.


The leaves of Creeping Charlie are rounded and have scalloped edges. Its purple flowers are quite small but can be abundant, giving the plant a vibrant appearance.

Growth Habit

Creeping Charlie grows low to the ground and spreads through stolons, forming dense mats. It thrives in a wide range of soil types and lighting conditions, making it a particularly persistent weed in many gardens.

Ironweed (Vernonia spp.)

Ironweed is a tall perennial weed that is often found in pastures and meadows.


Ironweed is known for its tough, woody stem and its vibrant purple flowers that bloom in late summer. The flowers are small but numerous, creating large, eye-catching clusters.

Growth Habit

Ironweed prefers sunny, well-drained locations. Though not as invasive as some other weeds, it can still become problematic in pastures and naturalized areas.

Understanding the Attraction of Purple Weeds

Though considered weeds, these purple-flowering plants have aesthetic appeal that may make them attractive to some gardeners. Their vibrant hues and diverse shapes add color and variety to the landscape.

Providing Food for Pollinators

Many of these weeds are excellent sources of nectar for pollinators. If controlled and managed, they could serve a purpose in supporting local bee and butterfly populations.

Ecological Considerations

Understanding the role of these weeds in the ecosystem might also help in managing them appropriately. In some cases, preserving them in controlled quantities can contribute positively to the local flora and fauna.

Controlling Purple Flowering Weeds

Despite their beauty, these weeds can become invasive if not kept in check. Common control methods include hand-pulling, mulching, and using specific herbicides that target these plants. Monitoring and early intervention can prevent them from spreading and becoming a significant problem in gardens and landscapes. However, a balanced approach that appreciates the visual and ecological roles of these weeds can lead to a more harmonious coexistence with cultivated plants.