Weeds with pink flowers can be attractive wildflowers.
But if you don’t want them growing in your yard, it’s important to identify the weeds. This helps you take the right measures to control and eradicate these unwanted plants.
So in this article, I’ll take a look at some of the most common pink flowering weeds.
Let’s dive in!
11 Weeds With Pink Flowers
It’s easier to identify weeds with photos and descriptions. So I’ll break down the important things to know about the following 11 weeds with pink flowers:
Common Stork’s Bill (Erodium cicutarium)
Also called redstem filaree and pinweed, common stork’s-bill is an annual or biennial broadleaf weed. You can find this plant growing throughout temperate Eurasia and North America. As well as north and northeast Africa.
Common stork’s-bill grows on dry grassy and sandy areas. And you’ll often find this weed growing close to the sea. The plant grows in a sprawling mass and can reach up to 60 cm high.
It’s easy to identify common stork’s-bill. The leaves of this weed are fern-like and have hairy stems. The stems are green-red or reddish-brown. Bright pink flowers grow in a loose cluster of 3-7 flowers at the end of the stems. Each flower has 5 almost elliptical petals. Common stork’s-bill flowers from May to August.
The seed pods of the plant are long and shaped like a stork’s bill. And when they’re ripe, the seed pods explode. Sending the seeds flying into the air and away from the maternal plant.
Red Clover (Trifolium pratense)
Red clover is a very common garden weed that you’ll often find growing on your lawn. It’s immediately recognizable by its dark pink flowers. Each flower head consists of 40-100 small flowers clustered together.
The plant grows in clumps and patches. And develops spreading or erect stems with the flower head at the top. The leaves of red clover grow alternately around the stem and are trifoliate — each leaf consists of 3 leaflets.
Red clover grows in any soil and quickly establishes itself. If you leave it, it will rapidly spread across your lawn and take over from desirable plants in your garden. So it’s best to deal with this weed early if you don’t want it around.
Pink Wood Sorrell (Oxalis debilis)
Also known as pink oxalis, pink wood sorrel is a flowering weed that needs your attention if it’s growing in your yard. The weed can be invasive. And it has a reputation for being very difficult to get rid of. As the weed spreads, it can destroy your lawn and make it difficult to plant in other garden areas.
The plant reproduces and spreads by bulbs and rhizomes. And the weed takes over an area by growing in dense patches and crowding out other plants.
You can identify pink wood sorrel by its 5-petalled pink flowers. And green clover-like leaves that grow in a small mound up to 1 ft. tall. Each leaf consists of 3 heart-shaped leaflets.
Field Bindweed (Convolvulus arvensis)
This perennial broadleaf weed is sometimes mistaken for morning glory because of the similar appearance of its bell-shaped flowers. The flowers can be white, pink-white, or pink in color.
Field bindweed is a creeping weed that extends long vines across the ground. When it encounters walls and trees it becomes a climbing weed that covers the obstacle in its path. And you’ll often first notice it as it scales your garden wall or fence and starts to encroach on your yard.
It’s a good idea to deal with field bindweed quickly once you notice it. The vine weed develops a deep root system that makes it difficult to remove once it’s established.
Shining Geranium (Geranium lucidum)
Shining geranium is an annual broadleaf weed that’s native to Europe, North Africa, and western Asia. Since its introduction to North America, the plant has become naturalized. But unfortunately, it’s now considered an invasive and noxious weed.
You’ll often see shining geranium growing in forest openings and along roadsides. But it might also sometimes make it into your garden.
The weed is red-stemmed and can grow up to 20-inches tall. At the ends of the stems, the tiny purple-pink flowers grow in pairs. Each geranium flower consists of 5 petals. The leaves of the plant are shiny and smooth. And each leaf has 5-7 lobes. The leaves are kidney-shaped or round. The plant also produces seed pods that look like a crane’s bill.
Milk Thistle (Silybum marianum)
Milk thistle is a winter annual or biennial weed that’s uncomfortable to handle. You’ll often find this weed growing in disturbed areas such as fence rows, pastures, and roadsides.
Milk thistle has spines that cover the edges of the leaves and stems. And large prickly bracts that extend out around the base of the distinctive pink-purple flower heads. The spiky weed blooms between April and October.
The fully mature plant can grow up to 6 feet tall. And has shiny green leaves with milky veins that give it a white marbling appearance.
Milk thistle has been used as an ornamental plant in the past. But it’s now a noxious weed. The weed aggressively invades suitable areas. Growing densely and pushing out native plants and beneficial forage. And the weed is toxic to grazing animals as it’s a nitrate accumulator.
If you can, try to get rid of this weed before it sets seed. The plant is a prolific seeder. Producing around 6,000 seeds that can lie dormant in the soil for 10 years or more waiting for the right conditions to germinate.
Himalayan Balsam (Impatiens glandulifera)
As the name suggests, Himalayan balsam is originally a native of the Himalayas. After introduction to North America and Europe, it has become naturalized and is now considered an invasive weed.
Himalayan balsam is very effective at dispersing seeds. And it’s also very attractive to pollinators. And this helps it to spread and outcompete native plants.
The big pink flowers are hooded and look like a policeman’s helmet. This is responsible for other common names used to describe the plant such as policeman’s helmet, and bobby tops in England. The weed flowers between June and October. After which, green seed pods form that are sensitive to touch and easily explode.
Himalayan balsam is a tall weed that grows over 6 feet. It has a green stem that’s sometimes red-tinged. And large lanceolate leaves that grow to around 9-inches long. You can eat the young leaves, seed pods, and seeds of Himalayan balsam. And you can use the flowers to make jam.
Rosebay Willowherb (Chamaenerion angustifolium)
Rosebay willowherb also goes by the names fireweed and great willowherb. The weed has brilliant pink flowers that are reminiscent of primrose flowers. Each has 4 petals with 4 narrow sepals behind.
Rosebay willowherb can thrive in almost any environment. And quickly spreads through seeds and rhizomes, forming large patches as it takes over an area. This makes it a difficult weed to control. And the plant is considered a noxious weed in many US states. It aggressively outcompetes native and cultivated plants when it invades an area.
Rosebay willowherb is a tall weed that grows up to 6 feet in height. And has thick red stems and lanceolate leaves. The plant blooms from late spring through to late summer. After which, reddish-brown seed capsules develop. Each contains 300-400 seeds that are easily dispersed by the wind.
Joe Pye Weed (Eupatorium purpureum)
Joe Pye weed is a herbaceous perennial weed that’s native to central and eastern North America. It’s an attractive wildflower that you’ll often see growing in roadside ditches, wet meadows, and on wooded slopes. Some people also like to cultivate Joe Pye weed as an ornamental plant in landscape gardens.
The weed thrives in moist soil and sunny locations. And if your garden provides the right conditions, the plant can spread by seed from nearby locations and start to grow.
Joe Pye weed grows in upright clumps. The plant can reach over 6 ft. tall, with whorls of 3-4 dark green leaves growing from purple leaf nodes on its thick green stem. The weed blooms from July to September. Producing small mauve-pink flowers that grow in clusters at the top of the stems. The flowers give off a sweet vanilla scent.
Spotted Knapweed (Centaurea stoebe)
Spotted knapweed is originally a native of Eurasia. But the weed was accidentally introduced to North America in the 1890s and is considered highly invasive. This weed is a problem wherever it grows because it’s poisonous to other plants and creates barren areas where only spotted knapweed can thrive.
The weed flowers from June to August. Producing purple-pink flowers that look similar to thistle flowers. The flowers are small and grow at the end of branched stems. There are bracts around the flower head extending under each flower petal.
The weed grows up to 4 ft. tall. And has long grayish-green leaves with lance-shaped lobes.
Field Madder (Sherardia arvensis)
Field madder is a winter annual broadleaf weed that’s widely distributed across Europe, North Africa, and parts of Asia. It’s also naturalized in the United States, Canada, Australia, and New Zealand.
Field madder is a low-growing plant that forms a dense mat as it sprawls across the ground. The square stems grow up to 16-inches long. And the pointed, elliptical-shaped leaves grow in whorls around the stem. The leaves are covered in short bristles.
Field madder blooms in the spring. Small flowers grow in stalked clusters of 4-10 at the end of the stems. The flowers are pink to lavender in color. And each flower has 4 petals and 4 stamens.
Field madder spreads by seed. And it’s common to find this weed growing in thin and patchy turf if the seeds are blown into your yard. You’ll also find it around grasslands, fields, pasture, and areas of dry and disturbed land.
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