Weeds With Purple Flowers

Weeds With Purple Flowers That Might Be in Your Garden

Life Cycles of Lawn and Garden Weeds

Maintaining a lush garden or a pristine lawn is every homeowner’s dream. However, the presence of weeds, especially those with purple flowers, can be a persistent challenge. Understanding the life cycles of lawn and garden weeds is crucial to effectively manage and control them. In this comprehensive guide, we’ll delve into the intricacies of 22 weeds with purple flowers and provide valuable insights on how to keep them in check.

22 Weeds With Purple Flowers and How to Control Them

Creeping Charlie

1. Creeping Charlie - Glechoma hederacea

Known for its rapid spreading, Creeping Charlie often invades lawns with its small, tubular purple flowers. To control it, maintain a dense and healthy turf through regular mowing and fertilization.

Purple Dead Nettle

2. Purple Dead Nettle - Lamium purpureum

Purple Dead Nettle, with its vibrant purple blooms, can be managed by maintaining well-aerated soil and promptly removing existing weeds. Mulching is also effective in preventing its growth.


3. Henbit - Lamium amplexicaule

Identifiable by its scalloped leaves and purple flowers, Henbit can be controlled by hand-weeding and applying a thick layer of organic mulch to suppress its germination.

Red Clover

4. Red Clover - Trifolium pratense

Although Red Clover is often considered beneficial for nitrogen fixation, its purple flowers can be controlled by mowing before the blooms mature and setting seed.

Wild Violet

5. Wild Violet - Viola sororia

Wild Violet, with heart-shaped leaves and charming purple flowers, can be managed by regular hand pulling and the application of herbicides specifically designed for broadleaf weeds.

Canada Thistle

6. Canada Thistle - Cirsium arvense

Known for its spiny leaves and purple flower clusters, Canada Thistle can be controlled by repeated mowing and targeted herbicide application during the growing season.

Nodding Thistle

7. Nodding Thistle - Carduus nutans

Prevent the spread of Nodding Thistle by cutting it before flowering and utilizing herbicides. Regular monitoring and early intervention are key to successful control.

Bull Thistle

8. Bull Thistle - Cirsium vulgare

Bull Thistle, recognizable by its large purple flower heads, can be managed by cutting off flower heads before seed formation and applying herbicides selectively.

Milk Thistle

9. Milk Thistle - Silybum marianum

Control Milk Thistle by uprooting young plants, as mature ones develop deep taproots that make removal challenging. Herbicides can also be applied for effective control.

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Purple Starthistle

10. Purple Starthistle - Centaurea calcitrapa

Prevent the establishment of Purple Starthistle by maintaining a healthy lawn and promptly addressing any signs of invasion. Herbicides are effective in controlling mature plants.


11. Heal-All - Prunella vulgaris

Heal-All, with its square stems and whorls of purple flowers, can be controlled by regular mowing and hand removal. Herbicides can be used for persistent infestations.

Purple Loosestrife

12. Purple Loosestrife - Lythrum salicaria

Manage Purple Loosestrife by hand-pulling or cutting before seeds mature. Planting competitive vegetation can also help suppress its growth in garden spaces.


13. Bugleweed - Ajuga spp

Control Bugleweed, a groundcover with striking purple spikes, by maintaining proper soil moisture levels and selectively using herbicides to prevent overgrowth.

Crown Vetch

14. Crown Vetch - Securigera varia

Crown Vetch can be controlled through regular mowing and strategic planting of competitive vegetation. Herbicides may be necessary for larger infestations.

Bush Vetch

15. Bush Vetch - Vicia sepium

Prevent the spread of Bush Vetch by maintaining a healthy lawn and promptly removing any emerging plants. Herbicides can be used for targeted control.


16. Comfrey - Symphytum officinale

Comfrey, with its hairy leaves and clusters of purple flowers, can be managed by cutting back the plants regularly and using organic mulch to suppress new growth.

Spotted Knapweed

17. Spotted Knapweed - Centaurea stoebe

Control Spotted Knapweed through regular monitoring and hand-weeding. Herbicides are effective for larger infestations, but care must be taken to protect non-target plants.

18. Dove’s Foot Cranesbill - Geranium molle

Dove’s Foot Cranesbill can be controlled by hand-pulling or using herbicides selectively. Maintaining a well-aerated lawn helps prevent its establishment.

Spanish Bluebell

19. Spanish Bluebell - Hyacinthoides hispanica

Prevent the spread of Spanish Bluebell by removing spent flowers before they go to seed. Herbicides can be used for targeted control in areas with persistent growth.

Bittersweet Nightshade

20. Bittersweet Nightshade - Solanum dulcamara

Bittersweet Nightshade can be managed by manually removing the vines and applying herbicides to prevent regrowth. Regular monitoring is essential for effective control.

Creeping Bellflower

21. Creeping Bellflower - Campanula rapunculoides

Control Creeping Bellflower through regular hand-weeding and applying herbicides to the roots. Preventing seed production is crucial for long-term management.

Common Burdock

22. Common Burdock - Arctium minus

Common Burdock can be controlled by digging up the taproot and applying herbicides to prevent regrowth. Regular inspections and prompt removal are essential.

Why are there purple flowers on my lawn?

The presence of purple flowers on your lawn may indicate the presence of various weeds, each requiring specific control measures. Regular lawn maintenance and targeted weed control are essential to prevent their spread.


What are some common weeds with purple flowers? 

Some common weeds with purple flowers include Purple Deadnettle (Lamium purpureum), Creeping Charlie (Glechoma hederacea), Henbit (Lamium amplexicaule), and Common Vetch (Vicia sativa).

Are all weeds with purple flowers harmful to my garden? 

Not necessarily. While some weeds with purple flowers can be invasive and detrimental to your garden, others may have minimal impact. It’s essential to identify the specific weed and assess its characteristics to determine its potential harm.

How can I distinguish between a weed and a desirable plant with purple flowers? 

Identification is key. Use plant identification resources or apps to distinguish between weeds and desirable plants. Additionally, observe the growth pattern, leaf shape, and overall appearance to make an accurate identification.

What methods can I use to control weeds with purple flowers? 

Various methods can be employed, including manual removal, mulching, and using herbicides. Manual removal involves pulling weeds by hand, ensuring you remove the roots. Mulching helps suppress weed growth, while herbicides can be effective but should be used with caution to avoid harm to desirable plants.

Are there any natural or organic methods to control weeds with purple flowers? 

Yes, several natural methods can help control weeds. These include using organic mulches, like straw or wood chips, which can suppress weed growth. Additionally, hand weeding and regular maintenance contribute to natural weed control.

Why do weeds with purple flowers seem to thrive in my garden? 

Weeds, in general, are often adapted to thrive in various conditions. Purple-flowered weeds may have specific characteristics that make them well-suited to your garden environment. Addressing factors such as soil quality, sunlight, and water can help create less favorable conditions for weed growth.

Can I use weeds with purple flowers for anything beneficial? 

Some weeds have beneficial uses. For example, certain medicinal herbs have purple flowers. However, it’s crucial to correctly identify the plant before using it for any purpose, as some weeds may be toxic or harmful.