Unwanted Grass In Flower Beds – Getting Rid Of Grass In A Flower Bed

Unwanted Grass In Flower Beds – Getting Rid Of Grass In A Flower Bed

By: Mary Ellen Ellis

Unwanted Grass In Flower Beds – Getting Rid Of Grass In A Flower Bed


The weed is the nemesis of the gardener. They out compete other plants you’re trying to grow, they take up precious nutrients and water, and they’re difficult to pull out by the root. This is especially true in flower beds and one tough type of weed to manage there is grass.

Grass growing in flower beds looks messy but there are a few tried and tested strategies for preventing and eliminating grassy weeds.

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Preventing Grass in Flower Beds

You can try to kill grass in flower beds, but if you can keep grass out of unwanted areas in the first place, your job becomes much easier. If you’ve ever tried pulling grass out by the roots and getting every last bit out, then you know it’s not just difficult but nearly impossible.

One good strategy for prevention is to use a barrier between beds and the lawn. Landscaping bricks or plastic barriers that you sink a few inches into the ground can really help keep grass at bay. Keep an eye on the edges and pull any grass you see creeping its way into the bed.

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You may also want to try pre-emergent herbicide to prevent any grass seeds that have gotten into the bed from growing. These don’t work on weeds that have already sprouted but will stop seed growth. Try products with the ingredient trifluralin for grass seeds.

Getting Rid of Grass in a Flower Bed

There is a good chance that your prevention methods will not be adequate to keep all grass out of your beds. A combination of barriers and pre-emergent herbicides with tools for killing unwanted grass in flower beds will give you the best results.

Once you have grass sprouting in a bed, you cannot easily pull it all out without seeing it return from root fragments. Use a grass specific herbicide on these weeds. Try herbicides with the ingredients clethodim, sethoxydim, or fluazifop-p which will kill grass but not damage flowers and shrubs.

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If you have vegetables nearby—and to be extra careful with flowers and bushes—use cardboard as a barrier when you spray. This will ensure the herbicide goes only on the weeds.

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In addition to herbicides, use a thick layer of mulch to smother the existing grassy weeds. A few inches (7.6 – 10 cm.) of mulch are required to really prevent their growth and keep the grasses from getting sunlight. If any grass emerges from the mulch, hit it right away with one of the selective herbicides or pull it out by hand (they’re much easier to manage this way).

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