10 common weeds in Nigeria By IROKA GOLDEN 1. Speargrass (Imperata cylindrica) It is a relatively tall type of grass (growing up to 3 m), and it looks very beautiful, with its long thin stems and fluffy flowers. In some countries, it is used for decoration, roof thatching and even medicine, but in Nigeria, it is mostly considered useless and troublesome, as it hampers agricultural production. 2. Siam weed (Chromolaena odorata) While it is known as devil weed in some places, this weed is not quite as bad as you think. Of course, it is a mostly useless plant that grows on the land that lies fallow, but it can keep other weeds away that are much harder to get rid of. 3. The Carpet grass (Axonopus compressus) The Carpet grass is an enduring, creeping, coarse-leaved grass. It grows better on wet, low soils in comparison with other grasses. This plant will grow well regardless of sun or shade but is less shade tolerant than Centipede and St. Augustine gras...