Top 20 Most Common Weeds in Cambodia

In the tropical climate of Cambodia, with its moist monsoon season, garden weeds readily proliferate, challenging gardeners and landscapers alike. The country's ample sunlight and rainfall create an accommodating environment for a variety of invasive flora. Among the most common garden weeds, Pepper elder, Chamber bitter, and Artillery plant are often found vying for dominance in both rural and urban settings, necessitating consistent management efforts to keep these tenacious plants at bay.

Most Common Weeds

1. Pepper elder

Pepper elder (Peperomia pellucida) is a perennial flowering plant that blooms all year. The entire pepper elder plant is edible and can be eaten raw or cooked.

2. Chamber bitter

Chamber bitter is blooms in summer. Its striking branched leaf pattern makes it an attractive ornamental, but it is a weedy plant that takes careful management to stop its seeds from spreading to unwanted areas. It is considered invasive in the southern United States.

Growth Rate:

Moderate

3. Dog fennel

Dog fennel is a perennial herb that has finely divided, towering leaves that emit a scent when crushed. Its feathery foliage and clustered flowers sway delicately in the breeze, adding to its decorative appeal. Wind-blown seeds help the plant flourish throughout the field. However, it is dangerous when consumed and has been used as insecticides and fungicides.

Growth Rate:

Rapid

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4. Artillery plant

The artillery plant is often utilized as a groundcover or an ornamental in many landscapes. It's commonly named the "artillery plant" because the males generally produce pollen in an explosive way. It grows best in a humid environment in partial shade or indirect sunlight. It's a particularly popular plant in indoor rock gardens.

5. Asthma-plant

Asthma-plant (Euphorbia hirta) is a ground-hugging spurge weed whose branches can grow to 61 cm long. It blooms from summer through early fall, dying off after the first frost. A milky sap will seep from broken stems or leaves. It can be a nuisance weed that reproduces rapidly.

Growth Rate:

Rapid

6. Culantro

Culantro, not to be confused with cilantro or coriander, is a culinary herb with a strong flavor used in dishes across East Asia, Latin America, and the Caribbean. Cultivation is increasing as demand for this herb grows in economies around the world. In tropical areas, this herb can be grown as a perennial, but it will likely only grow as an annual in colder areas.

7. Cutleaf groundcherry

Physalis angulata is an annual plant belonging to the nightshade family Solanaceae. It has dark green leaves that are roughly oval, and often have tooth shapes around the edge. The flowers are a pale yellow and the yellow-orange fruits are wrapped inside a balloon-like calyx, which is toxic and should not be eaten.

8. Common purslane

Portulaca oleracea, colloquially known as common purslane, is an annual succulent species with reddish stems and tiny yellow, five-petal flowers. It is used for culinary purposes in various parts of the world, most often raw, in salads. Common purslane is also a good companion plant for crops that thrive in moist soils.

Growth Rate:

Rapid

9. Climbing dayflower

The climbing dayflower can be used as a sprawling groundcover with light blue flowers that attract bees and butterflies. However, it spreads easily when nodes on its small branches touch the soil and begin to root. Since it can spread aggressively, it is sometimes seen as an invasive weed that is treated with herbicide.

Growth Rate:

Rapid

10. Crown Flower

The crown Flower has beautiful flowers that are used to make leis and were a favorite of the last queen of Hawaii. The outer petals of this flower curl back, and reveal what looks like a crown inside. The sap of this plant may cause skin irritation and can be considered toxic.

11. Mexican fireplant

Mexican fireplant is native to tropical America, but it has been naturalized in other tropical and subtropical regions in the world. *Euphorbia heterophylla* is a poisonous plant to humans and livestock. It contains a toxic milky sap which can cause strong skin irritation.

12. Creeping woodsorrel

Creeping woodsorrel (Oxalis corniculata) is a flowering herb which grows aggressively. The leaves have a lemony flavor and are often made into tea that's rich in vitamin C. However, if ingested in large amounts the oxalic acid for which the genus is named can begin to block the body's calcium absorption.

13. Water hyacinth

Water hyacinth (Eichhornia crassipes) is a fast-growing flowering plant species with ovular, waxy leaves. Water hyacinth is listed as a federal noxious weed in the United States. This species is invasive to ponds, lakes, rivers and other wetland habitats. It forms dense, floating mats of vegetation that restricts light to underwater environments.

Growth Rate:

Rapid

14. Blue porterweed

Blue porterweed is native to the Caribbean and considered an invasive species in many areas outside.

15. Lambsquarters

Lambsquarters has many other names, including pigweed, goosefoot, and bacon weed. This plant seems to appear out of nowhere and is considered by many to be a pesky weed. However, the greens of this plant are edible, can be prepared similar to spinach, and are packed with nutrients.

Growth Rate:

Rapid

16. Pigeonberry

The pigeonberry is a vine-like herb that can reach heights of 40 to 200 cm. It produces a bright red berry as a fruit that is tested to be safe to consume. The juice made from these berries was once used as a dye and ink.

17. Annual fleabane

While native to North America, the annual fleabane has been introduced to other places around the world, as well as in 43 states of the United States. It is a popular choice for bees, flies, wasps, and butterflies as a source of nectar, but is invasive and is threatening the native ecosystem where they grow.

18. Goosegrass

When there is a famine or a lack of food, the seeds of goosegrass are eaten. This agricultural weed is utilized for cultivated crops, animal feed, and golf courses. It is classified as an environmental weed in various nations. Some Asian countries employ parts of this plant as herbal medicine.

Growth Rate:

Rapid

19. Pokeweed

Although its berries look juicy and tempting, the fruits and the root of pokeweed are toxic and should not be eaten. Pokeweed is considered a pest species by farmers but is nevertheless often grown as an ornamental plant. Its berries can be made into pokeberry ink as well.

Growth Rate:

Rapid

20. Lilac Tasselflower

Lilac Tasselflower (Emilia sonchifolia) is an annual herb that will grow to 61 cm tall. Native to China and the western Pacific, it is considered a weed in most regions of the United States. It grows in full sun in open areas and features edible leaves and lavender pink flowers. Flowers are followed by seed heads with white, fluffy seeds that are easily dispersed by the wind.

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Most Common Toxic Plants

Cambodia's warm, humid climate and diverse ecosystems, which include rainforests and wetlands, create a conducive environment for a variety of flora, including , , and . The region's ecological conditions are favorable for the growth of toxic plants. While effective for maintaining ecological balance, this prevalence poses risks to human and animal health, underscoring the importance of awareness and education about these potentially harmful species.

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As the Cambodian landscape transitions into Spring, a fresh palette of colors emerges, heralded by a trio of remarkable flowers. The delicate unfurls its petals, embodying the season's essence of renewal. Meanwhile, the vibrant comes to life, symbolizing Spring's vivacity. Furthermore, , with its significant cultural role, adds to the spectacle, each bloom contributing uniquely to Cambodia's springtime tapestry.

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In Cambodia, you can find Asian Rice, Golden pothos, Zanzibar gem, Heart of jesus, Snake plant, and more! There are 50 types of plants in total. Be sure to look out for these common plants when you’re walking on the streets, in parks, or public gardens.