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For example, some weeds grow in situations of compacted soil, such as knotweed. You can also control
growth by taking better care of
grass, rather than focus on
weeds. You can raise or lower
mowing height, change
frequency of mowing and changing
amount of time between irrigating. Also, you can increase or decrease application of fertilizer and aerify
soil. This will maintain better grass, thus keeping
growth dense and vigorous, which as discussed above, does not attract weeds.
In addition to culture practices, sometimes
assistance of chemicals is needed to control weed growth. In that case, there are several types of herbicides that can be used. Preemergence herbicides will affect seeds that are germinating. Since they are best used two to three weeks before
seeds start to grow, these work best to combat annual weeds. Postmergence herbicides are used, as their prefix implies, after
weeds have sprouted. Since they must be absorbed through
leaves, this types of herbicide works best with a spray.
These can be used at any time, but are most effective when
weed is still young and growing. Selective postmergence herbicides are usually used to control annual, biennial and perennial broadleaf weeds, as they will not damage grass. But, they can kill trees, shrubs and flowers. These have to be used in proper conditions as well, with no rain in
forecast for two days to follow, air 60-80 degrees and no winds. Finally, non-selective postmergence herbicides kill all types of weeds, and are best used to spot treat grassy weeds that are not affected by
selective herbicides.
So next time you see a Dandelion plant growing, don't make a wish and blow
seeds toward in
direction of a lawn fanatic- they may not get
perfectly manicured lawn they wished for!

For hundreds of other tips for creating your own perfect lawn, be sure to visit: http://www.YourPerfectLawn.com