|
Some fertilizer products contain preemergent or postemergent
herbicides for weed control, usually crabgrass prevention or control
of broadleaf weeds.
When to use these products
- Use only when the lawn has a known weed problem, not every
time you fertilize.
- Apply when you have observed high numbers of weeds and are
sure treatment is necessary. With preemergent products, this
means relying upon weed populations observed the previous year.
|
What to watch out for
- Be sure the active ingredient in the product is one that will
control the weed species that is causing your problems and also
that the timing is right.
- It is useless to apply preemergent herbicides after target weeds
have emerged.
- Be aware that certain broadleaf herbicides, such as dicamba
(found in several weed-and-feed products) and triclopyr can be
absorbed by tree roots growing in lawns and may injure trees if
applied too close to the tree drip line.
- Precautions are always listed on the herbicide label.
|
