Weeds are the bane of most lawn lovers' lives; even using the finest herbicides available and the best application methods, it is not possible to remove all weeds in one go. There are a number of reasons for this: to eradicate weeds they have to receive a direct spray of herbicide, but where the weed count is high, the leaves of some weeds will cover and protect others. Also, the growing seasons and therefore the susceptibility of weeds to herbicides, vary between types of weeds.
Generally, you can expect over half of your weeds to deteriorate in any one treatment, therefore, after three or four treatments, most of your weeds will have disappeared. However, it is a never-ending battle to keep your lawn weed-free as seeds lie dormant and others are blown in from neighbouring locations; resulting in re-contamination of your lawn, so continued treatment is necessary.
Here is a selection of the most common lawn weeds, although your local operative will be able to advise you when he carries out a lawn analysis if you have anything more 'exotic'!