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Shiny Geranium

shiny geranium

Geranium lucidum • Class A

Family Name: Geraniaceae family (jer-ay-nee-AY-see-ee)
Common: Geranium family
Genus: Geranium (jer-AY-nee-um) 
Meaning: From the Greek meaning crane; referring to the beak-like fruit
Species: lucidum (loo-sid-um)
Meaning: Bright, clear lustrous
Description:

Shiny Geranium grows between 10 to 12 inches high and can tolerate either sun or shade. Seedlings sprout during the first fall rains and continue to grow through fall and winter, forming large patches that begin to bloom in April and May. Its stems are usually tinged bright red, and bears bright green, round leaves that are deeply lobed, around 1 ½ inches across, and very waxy, and shiny. Leaves turn vivid red in summer and fall. The five petaled pink flowers grow in pairs on the ends of stalks, at the same height, or in amongst the leaves. 


 Why Is it a Noxious Plant?

Shiny geranium spreads quickly and is difficult to control.  It establishes in early spring and then dominates the site by pushing out many other early season plants. 


Where Does it Grow?

It prefers shade and will invade undisturbed forest understories and form monocultures that replace native plant communities. As soils dry, few other plants are able to establish through the receding weed canopy. 


Facts:

Shiny Geranium reproduces by seed. Each seed capsule produces five seeds that are forcefully ejected when ripe. The ability to propel seeds gives this plant the capability of spreading in an upward direction; into the crevices of tree trunks or ascending up a steep terrain. It can produce up to 5 generations in one year. 


Control Options:

Hand pulling is a viable control option where there are small populations or isolated plants. Hoeing or raking may also work if plants are removed after being loosened up. However, disturbing the soil this way may cause new seedlings to emerge, especially when dealing with large populations of Shiny Geranium. 

  • Because the species is a low-growing plant, it is often found amongst desirable vegetation. Therefore applications of herbicide should be used only where there are large numbers of plants. 

  • Spot spraying with an herbicide containing the active ingredient glyphosate (used in Roundup Pro, or Glyphos) is effective. Glyphosate is non-selective however, and will injure any plants it comes in contact with. Spot applications may be done anytime the plants are actively growing, from early spring to late fall. It is best to treat them before seed capsules mature and produce seed. 

  • When using herbicides, carefully read and follow all label instructions and obey all label precautions. (Note: pesticide product registration is renewed annually and product names and formulations may vary from year to year.) 

  • Because Shiny Geranium is a class A noxious weed it must be eradicated completely whenever it is found, therefore biological control is not a viable option. 


More Information:

 Download our Flyer or visit Washington State Noxious Weed Control Board Here. Photo by Leo Michels

 


More Pictures:
shiny geranium


shiny geranium
 shiny geranium

 

 

shiny geranium

 

Washington State Weeds