Cracks and crevasses in pavement are comfortable and sneaky hiding places for weed seeds. Weeds in pavement are advantageous and use these convenient locations to secrete their seeds until growing conditions are optimal. Breezes and other movement funnel seeds into holes in pavement where they are protected from further eviction.
The methods on how to treat weeds in cracks include futile pulling and much more effective pavement weed killers in the form of chemical and natural formulas.
Types of Weeds in Pavement
Any home or property owner knows the battle. Weeds growing in pavement cracks are an all too common problem and create a constant war with these unwanted plants. You can spray all you want, but the pests will be back next season and spring out of holes and fissures. Weed control on pavement is a necessary exercise but also an ongoing struggle to gain power over these hardy and adaptive plants.
The attack of weeds begins when their seeds find a hospitable habitat. Breaks in sidewalks and concrete areas collect detritus that composts and provides nutrients for seeds that drift on into these areas. Some of the more aggressive species are dandelions, thistle and sticker weed.
Even normally desired plants, such as rhubarb and some berries, will slide along into splits in pavement, using such chinks as natural growing areas. Yarrow, pigweed, gumweed and flowering prickly lettuce are other weed species that thrive in the gaps of pavement.
The adaptability of weed species is to their advantage and the home owner’s loss. Let the games begin.
How to Treat Weeds in Cracks Naturally
Concentrated vinegar is one of the best methods you can use if you wish to avoid chemicals. Highly concentrated horticultural vinegar will work on many broadleaf species. Household vinegar is not strong enough to do more than kill the leaves, which will over time reduce the vitality of the plant but must be applied several times to keep the leaves from forming and producing plant sugars.
Weeds with deep taproots, such as dandelions, are not as easily removed with vinegar, as the roots can reach nutrients deep down in soil. Consistent pulling may also have an effect on some weeds species but if you can’t get the entire root, many varieties will simply sprout anew.
Weed control on pavement cracks that are slim is the most difficult of all because pulling generally leaves behind the roots.
Effective Pavement Weed Killer
The use of herbicide is one of the best ways to kill roots of weeds in pavement. There are several formulas to purchase that target different types of weeds. Brush and berry plants require the strongest formula available, but be cautious, as these are not necessarily selective and any nearby plants can be affected by drifting spray.
Weeds growing in pavement cracks may require a secondary application of even chemical formulas. Read and follow the directions on the product carefully, as many of these chemicals are dangerous to humans, animals and invertebrates, as well as non-selected plants.
Note: Chemical control should only be used as a last resort, as organic approaches are safer and more environmentally friendly.