Even the most vigilant gardener will have a weed or two in their lawn. Herbicides are useful in the battle against annual, perennial, and biennial weeds, but you have to know when to use them and which ones are most effective against a particular weed problem.
As with most plant chemicals, the weather and type of weeds will affect the application method. When using pre-emergents for winter annuals, apply in fall because that is when the seeds germinate. Summer annuals germinate in spring and that is the correct time to apply a pre-emergent. If you are unsure what type of weed is the most troublesome, it is a safe bet that a springtime application will control the majority of the pests.
What are Pre-Emergent Herbicides?
Established plants have nothing to fear, as their root system is already developed and the plant is hearty and healthy. Pre-emergent info indicates that it is the sensitive root tissue of newly germinated seedlings that is killed off, resulting in complete plant death.
Perennial weeds develop thick persistent adult roots that re-sprout in spring, which makes them difficult to control with a pre-emergent formula. Annual weeds are in two classes: winter and summer annuals. The timing of a pre-emergence weed killer for each must match the germination period for the variety of weed. Biennial weeds, like dandelions, are not controlled by a pre-emergent because they produce seed that germinates nearly year around.
Pre-emergence weed killers are used on established lawns as part of an annual effort to combat plant pests. What are pre-emergent herbicides? These chemical compositions are used before weeds take hold to kill off infant root systems and keep them from growing. Learn how pre-emergent herbicides work so you can decide if they are the right method for you.
Post-Emergent Herbicide: Kills weeds that are actively-growing and have already emerged from soil. It’s an ideal herbicide for spot-treating lone offenders but is often applied to entire lawns. Post-emergent herbicides come in two basic forms – contact and systemic.
Perennial Weed: Lives for two or more years; plants grow as long as conditions are favorable and frequently die back to soil level with hard frost; new growth emerges at the start of the growing season, originating from roots or stem remains; in warmer regions, some perennial weeds can be green year-round.
All About Lawn Herbicides
Examples: Chickweed, Clover, Dandelion, Henbit
Other ways to gauge application time include using bioindicators, such as plants whose growth signals the correct time for application. For instance, in northern climates, spring Crabgrass applications are often timed when Forsythia is blooming, which frequently (but not always) occurs when soil temperatures are in the 50°F range. Another option is to time applications based on the calendar. For example, if you typically apply a pre-emergent herbicide in mid-April with success, then continue that routine.
A weed is a plant that’s growing where it’s not wanted. Weeds aren’t something you plant intentionally; they just appear. Often they grow vigorously, outpacing and overrunning desirable plants. There are several types of weeds:
Fact: Many perennial grassy weeds form rhizomes, fleshy roots that resprout if left behind in soil during hand-weeding.
Weedol selective lawn weedkiller is ready to use on your lawn and grassland to kill weeds, without damaging the grass.
Roundup is the market leading brand of glyphosate weedkiller. Degrades in the soil allowing seeding or planting two weeks after application.
Safely kills weeds without glyphosate, with visible effects in just one hour. Use to kill broad-leaved weeds and grasses in paths, patios and in the bases of roses, shrubs or trees.
Weedol Pathclear weedkiller is a total weedkiller designed to control weeds in areas such as drives, paths and along fences and walls for up to 3 months by killing existing vegetation at application and creating an invisible barrier that prevents new growth.
For especially tough areas, we even offer stump killer which makes removing freshly cut tree stumps and invasive species like Japanese knotweed far easier. Our own BS lawn Feed and Weed Plus Moss Control will even replace precious nutrients in the soil as it helps eradicate weeds and moss.
Removing weeds manually is an incredibly time consuming, labour intensive task that isn’t always that effective. Weed roots are known for spreading out over large areas making it incredibly difficult to dig them out. But, with the right weedkiller, you can certainly make the task much easier.
Weedol lawn weedkiller is specially designed to kill weeds in existing lawns whilst leaving the existing grass completely unharmed.