This cool weather really has our local oysters tasting good,
and the soil temperature indicates that it is just about time to apply
preemergent products to your beds and turf. Valentine’s Day (applying preemerge
for your wife is a great present by the way if you like living with the dog in
the dog house) has come and gone and the running of the Daytona 500 is this
week. So now is the time to apply the magical weed preventer, and this year is
shaping up to be no different.
Depending on which Phd doctor you believe, crabgrass
germinates when the soil temperature (3 inches deep) stays above 55 degrees
(some people say 57 degrees), for 3 straight days provided adequate moisture in
the soil. Now some doctors say remains 57 degrees or above for 24 hours at a
depth of 3 inches with adequate moisture.
If you are not in to monitoring the soil temperature, Valentine’s Day or
the running of the Daytona 500 should work for you.
The turf areas as well as the landscape bed areas will
greatly benefit from the use of preemerge products. Not only will the yard look
better, but your plants will not have to compete with the weeds for sun,
nutrients, and water. If you are controlling weeds with preemergent products,
there are less weeds there for you to spray or pull, saving you time. There is
also less stress on you trying to find time to control the weeds in your yard
(example “Honey, [Johnny or Jane] and I are going [turkey hunting, spot tail
fishing, golfing, to watch March Madness and eat chicken wings {Jane shopping,
going to the movies, getting my hair done}].” Spouse reply, “ok sweetie, have
you sprayed the weeds in the front yard like you said you were going to do last
week?”) Kill them now with a preemergent control product!
For those new readers of the Horticulture Hotline (with the
record setting snowfall in the Northeast, I expect many new readers as soon as
they can sell their house and get down here), preemergent control products kill
weeds as they germinate. The weeds never
come up and you never have to worry about them.
Crabgrass, goosegrass, barnyardgrass, crowfootgrass, dallisgrass
(seedling), foxtail, annual bluegrass, smutgrass, barley, kikuyugrass, wild
oats, bittercress, carpetweed, chickweed, Carolina geranium, henbit, knotweed,
lespedeza, marestail, black medic, mustard, oxalis, pineappleweed, pigweed,
redroot, parsley-piert, purslane, rocket, shephardspurse, speedwell, spurge,
and woodsorrel are examples of weeds controlled by preemergent products. Small seeded annual weeds are controlled by
preemergent products.
Read the label of the specific product that you are using to
get an exact list of weeds that the manufacturer has tested and shown to
control. Preemergent products applied now do not control winter annual weeds
that are already up like annual blue grass. To control annual bluegrass, you
would have used a preemergent in August.
Clover, Florida Betony, Nutsedge and Dollar weed are not
controlled by preemergent control products.
These are perennial weeds. Weed Free Zone is a liquid that will do a
good job on controlling many of your broadleaf weeds. The Nutsedge will require
a different product and is most likely not visible right now. It is important to control these weeds now
before they go into their reproductive stage.
A weed in its reproductive stage is harder to control than a weed in its
vegetative stage. By killing the weed now you avoid having to deal with more weed
seeds next year.
It is very noticeable when you ride through the Lowcountry
which homeowners and which businesses used preemergent products last fall at
the correct time. One business or home lawn will be nice and brown and dormant
with-out a spec of green in sight. Right next to it will be brown turf mixed
with green weeds. Again, it is very important to control those weeds now before
they begin to flower.
