The pre-emergent herbicides come in liquid or granular form. These are extremely effective in killing the weeds while they are germinating. Keep these tips in mind for applying the pre-emergent herbicide and be sure that your lawn will not show any signs of weeds this season.
Choose the pre-emergent herbicide wisely
There are several types of pre-emergent herbicides available in the market. Be sure you choose the one that is meant to kill the weeds of your region. Choosing the wrong type of pre-emergent herbicide can make the whole practice of applying the herbicide futile.
Follow the directions given on the label of the pre-emergent herbicide
Do not forget to read the label of your chosen pre-emergent herbicide in detail. Be extremely careful during application as some strong pre-emergent herbicides can kill the grass too of the instructions are not followed properly.
Aerate the lawns before applying the pre-emergent herbicide
These pre-emergent herbicides form a layer on the soil, which prevents the appearance of the weeds. Aeration of lawns is necessary but must be done before applying the pre-emergent herbicide. There will be no use of applying the herbicide if the lawn is aerated afterwards. This is because the puncturing of the herbicide layer will give way to the weeds to sprout.
Do not apply the pre-emergent herbicide on the new sod
The new sod is extremely sensitive. So it should not be disturbed. Never apply the pre-emergent herbicide on the new sod as it can accelerate the pre-mature grass to wither and die.
Follow the right timings for applying the herbicide
To kill any type of weeds with a pre-emergent herbicide, the knowledge of the life cycle of that weed is the basic requirement. If you experience the same types of weeds every season, you can easily get the information on their life cycles on the internet or from a gardener. Apply the pre-emergent herbicide at the time of their germination.
Do not apply the pre-emergent herbicide too early
Keep in mind that the herbicide is meant to kill the weeds during their germination, so do not apply it too early/
Apply the pre-emergent herbicide using a spreader
The spreaders are extremely useful for even distribution and proper calibration. The herbicide will not be effective if it is not distributed evenly or if the calibration is wrong.
Keep watering the lawn before and after applying pre-emergent herbicide
The water is good for your lawn grass and for the herbicide action too. So keep watering the lawn as usual in the mornings and the evenings.
Do not thatch the lawn after applying the pre-emergent herbicide
The thatching will have the same effect as aerating of the lawn. It will puncture the layer of the pre-emergent herbicide, making it of no use at all
Re-apply the pre-emergent herbicide if required
Some weeds do not germinate at the same time. So study their life cycle and re-apply the pre-emergent herbicide at the time of the late germination.
Discussion with my agriculturist father