It remains a challenge to find proven organic pre-emergent herbicides, though during our research, we discovered a variety of solutions that satisfy many organic principles. Fortunately, most organic liquids are far kinder to both plants and people, so while compiling our list of recommendations, we were able to find a variety of different products that prevent weeds.Īs with any of the household or garden chemicals we investigate, sustainability is a key part of our selection process. Many traditional liquid options are prone to overspraying and can burn the affected areas. While our research did find that there are two types of herbicides available-liquid and granules-we found that granules were more effective at providing long-lasting weed prevention. We looked at the various types of pre-emergent herbicides on the market to determine our top picks, each of which is suited to specific shoppers looking for a particular characteristic for their yard. How We Chose the Best Pre-Emergent Herbicides Regarding ingredients, choosing sustainable, environmentally friendly options that won’t pose health risks or damage the soil is always the best bet. But others will kill almost any seed and aren’t a good choice for recently sowed flower borders, vegetable beds, or newly seeded lawns. Some pre-emergent herbicides are fairly specific about the weeds they target. When broadleaf weeds are mature, they’re tougher to get rid of, so a contact or systemic weed killer that attacks the leaves and root system may work best. Because they stop roots from forming, pre-emergents are an effective way to control weeds, but they aren’t necessarily the right product for every weed in a lawn or yard, including broadleaf andgrassy weeds.Ī pre-emergent herbicide will prevent weed seedsfrom germinating dandelions and crabgrass, for example, but it won’t kill the plant once it’s established. Pre-emergent herbicides create a barrier that prevents weed seeds from sprouting. Photo: Before You Buy Pre-Emergent Herbicide BEST EASE OF USE: Lawnbright Organic Pre-Emergent Weed Control.BEST FOR LAWNS: Safer Brand Weed Prevention Plus Corn Gluten.BEST WITH FERTILIZER: Sustane Spring Weed and Feed Corn Gluten.BEST FOR FLOWER BEDS: Gardener’s Supply Company Weedguard Plus Paper Mulch. BEST BANG FOR THE BUCK: Preen Natural Vegetable Garden Weed Preventer.BEST OVERALL: Espoma Organic Weed Preventer.This guide points out what to look for when shopping for a pre-emergent weed killer and lists several top products that can all help prevent these unwanted grasses. The best pre-emergent herbicide product will vary depending on the size of the area requiring treatment and the type of weeds the gardener wants to kill. A pre-emergent herbicide prevents the sprouting of undesirable weed seeds, so it’s a beneficial partner in the war against weeds in lawns, flower beds, and even vegetable gardens. Stopping weeds early-before they can emerge from the soil-is the goal when applying a pre-emergent herbicide.
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