Weeds are actually plants that are left to grow by nature unchecked in its natural habitat. Depending on its location, there are diverse groups of weeds that thrive in different climates and settings. If left to grow wild, weeds can overcrowd other landscaping shrubs, grasses and other ornamental plants.Weeds are classified mostly according to the shape of the foliage, its manner of growth, and the time when it grows.
According to Growth:
Crabgrass - once this grassy weed has started to occupy a place in your garden it can be very challenging to eradicate it. This type is annual and it germinates by seeds dispersed during the previous year. Sunlight is the best friend of crabgrass where it helps it to sprout. With this type of weed, it's convenient for one to prevent it from growing instead of controlling it once it has sprung. The weed starts to germinate once warmer temperatures comes (15 C) usually middle of May and then continuing through spring and summer. Apply mulch on areas where there are wanted plants so as to stop crabgrass from germinating.
Wild Onion - A close cousin of the cultured onion (Allium cepa), wild onion resembles like a grass at a glance. Close examination will reveal triangular leaf configuration contrary to a lance or linear-shaped blade that one notices on a lawn grass. It can grow from its small buried bulb up to two feet when it blooms in late summer. One will notice a distinctive onion aroma when near this weed. Ways to prevent this wild onion from sprouting is to cover the soil with mulch or either use "Solarization" so that weed seeds will be eliminated. This process should be done in the spring where weed seeds start to germinate.