Warm weather means time to go after weeds

  • Wednesday, February 6, 2013

Call it climate change, a weather pattern or, not to be political, “global warming,” I like this weather.

Baggy T-shirts all year long. Daffodils showing color, Prunus trees blooming (Cherry, Peach, Crabapple) and the soil temperature indicates that it is just about time to apply preemergent products to your beds and turf.

I know many of you are used to waiting for Valentine’s Day (a great present by the way if you like living with the dog in the dog house) or the running of the Daytona 500 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 three straight days provided adequate moisture in the soil.

Some doctors say the soil should remain 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 pre-emergent products, there are less weeds there for you to spray or pull, saving you time.

For those new readers of the Horticulture Hotline, preemergents 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.

Clover, Florida Betony, Nutsedge and Dollar weed are not controlled by preemergents. 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.

With the warm weather we have had, 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.

If you want to control the Sweetgum balls, now is the time to arrange that treatment. An arborist can inject Snipper now and the balls will not develop into the nuisance in the landscape that they would otherwise.

Call right away as this is a timing issue as well.

Always read, understand and follow product label. The product label is a federal law.


(Bill Lamson-Scribner can be reached during the week at Possum’s Landscape and Pest Control Supply. Possum’s has three locations including 481 Long Point Rd. in Mount Pleasant (971-9601). Bring your questions to a Possum’s location or visit us at http://www.possumsupply.com. You can also call in your questions to “The Garden Clinic”, Saturdays from noon to 1 p.m., on 1250 WTMA. The Horticulture Hotline is available 24 / 7 at possumsupply.com.)

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