Pre-emergent herbicides can
actually be helpful throughout the majority of the growing
season. Various weeds germinate at different times, so
repeated applications of the correct herbicide can eliminate
the majority of weeds in any lawn or yard.
A pre-emergent is activated in the
top layer of soil, where the majority of weed seeds sprout,
and keeps the plant from developing. Weed seeds can lay
dormant for years waiting for a chance to pop up. Consistent
appointments are suggested in order to reduce weed growth by
applying pre emergent every six months. Doing this maintains
the chemical barriers and eliminates any sporadic growth.
It is necessary to water the areas
sprayed with pre-emergent within three days of application
in order for the chemical to soak deeper into the soil.
The “post” part of post-emergent
herbicide refers to the fact that it is used on already
existing weeds. This type of herbicide kills weeds in a much
different manner from that of pre-emergents.
Systemic post-emergent works by
absorbing through the leaves and travels down the stalk of
the plant into the root system killing the weeds after
they’ve started growing above the ground.
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