Preventing Crabgrass Problems in
Crabgrass is a warm-season annual grass. No matter how many crabgrass
plants appeared in your lawn last year, they are all dead. Crabgrass
can only reappear in 2001 from germinating seeds. Crabgrass will
not start germinating until soil temperatures get close to 60 degrees
and stay there for several consecutive days, which most likely is
not until late May or early June in lawn areas. So remember, you
have plenty of time.
Crabgrass prefers full sun, moisture, and thin lawns that allow
light to hit the soil. Sound lawn care practices to allow for thick,
vigorous lawns that shade the soil help prevent crabgrass from becoming
a problem. Mowing height perhaps has the most impact on crabgrass.
Mow between 2 1/2 and 3 inches and there will be fewer crabgrass
plants in your lawn. In addition, avoid frequent watering, especially
frequent light sprinklings. If possible, hold off lawn establishment
or renovation work until late summer to avoid potential crabgrass
problems from appearing on open soil areas in lawns.
Preemergence herbicides (weed killers) are available to use in
spring for crabgrass control and need to be applied to the lawn
before crabgrass germinates. Late April into early May is the suggested
application time for our area. If April is unusually warm, apply
by late April, otherwise early May is not too late.
Most preemergence crabgrass herbicides are found in combination
with lawn fertilizers, so crabgrass prevention and spring fertilization
can be done together. Follow the rates given on the bag. One word
of caution; except for siduron, all preemergence herbicides for
crabgrass will also damage germinating desirable grass seed. Siduron
may be found as lawn starter fertilizer with crabgrass preventer.
April - May 2001: Prevent
Garlic Mustard from Setting Seeds | Perennial
Gardens with a Purpose | Garden Styles
| Preventing Crabgrass Problems in Lawns