Should I Bag My Grass Clippings If I Have Weeds

If you’re like most homeowners, you could spend a lot of time and effort on having a lovely green lawn, and keeping on top of dealing with any weeds can be challenging.

To keep your lawn in good shape, you need to mow it regularly, which leads to vast amounts of grass clippings, which must be disposed of. So, if you have weeds in your yard, do you think you should bag your grass clippings, or can you leave them on your lawn?

If you have weeds, bag grass cuttings, especially if seed heads are sprouting. Although mulching or leaving grass clippings on the lawn is beneficial for maintaining a healthy lawn, it has the reverse impact when weeds are present.

grass clippings on the bag

For grass clippings, you bag them or mulch them. This can be a difficult option to make, and for one, you will wonder, does mulching grass spread weeds?

In our guide, we go through if you should bag grass clippings or not, and by the end, you’ll all you need to end up with a great lawn without spreading weeds as you produce grass clippings and spread grass seed over thinning areas. (Learn Best Time To Buy A Lawn Mower)

Does Bagging Grass Reduce Weeds?

Mowing weeds in your lawn can be effective if done correctly. Many people believe that mowing common weeds spreads them, but rosette weeds like dandelion, thistle, and plantain may be controlled by mowing regularly to remove blossoms and harm the leaves.

For creeping weeds like creeping charlie, black medic, and clover, attach a collection bag to the mower. Because if you don’t remove weeds, they can re-root and spread from cuttings and seeds, so it’s best to bag your grass clippings rather than mulching them if you have weeds.

The next step is to weigh the benefits and drawbacks of bagging your grass clippings. Understanding why bagging grass clippings might be beneficial or harmful will make it easier to determine how to proceed.

There are other factors to consider that have nothing to do with whether you have weeds. If you have weeds, remember to bag the cuttings to avoid spreading the seeds, presuming you have weeds with seed heads.

messy grass

Bagging Grass Clippings Stops Yards Looking Messy

Do you prefer to peek out the window at your lawn and notice how well-kept it is? Leaving grass clippings on the lawn can harm the beauty of your lawn, making it look cluttered and untidy.

It’s difficult to deny that grass clippings left on the lawn are unsightly. If you want to keep your lawn looking tidy and ready to use, you should bag the grass clippings.

Many folks who value their lawn’s aesthetic appeal will choose to bag the grass clippings. When you do that, it’s just easier to maintain things looking beautiful.

Keeping grass clippings on your lawn has some benefits, but they may not be worth it to you. It all depends on how you feel about the way your yard looks with grass clippings.

Bagging Grass Clippings Prevents Rot

Because of decay, bagging grass clippings is sometimes the most workable option. It’s possible that leaving a pile of grass clippings on top of your lawn will prevent it from growing.

The presence of grass clippings may prevent the grass from receiving sunlight. It can suffocate the lawn from further growth and cause bare spots.

However, this usually only happens if you don’t mow your lawn frequently enough. Leaving grass clippings on the lawn will be an issue if you only mow once a month and the lawn is getting out of hand.

It’s relatively simple to avoid problems like these by mowing regularly and not letting your grass get too tall. You’ll only have to remember that rot can be a concern if you don’t mow very often.

When To Mulch With Clippings

Mulching with clippings is best done in the late fall and early spring. Mulching helps grass grow healthy with the added nutrients and organic matter in the soil. Here are some reasons why you should mulch your lawn:

  • It saves money and time spent on clippings packing, raking, and handling.
  • Mulching naturally returns nutrients to the soil.
  • Mulching helps to keep the soil moist and avoids water evaporation by providing shelter from the sun.
  • During rainy seasons, it reduces water run-off.
  • Mulching reduces the need for chemical nutrients. (Read Best Mulch For Vegetable Garden)

Do Weeds Spread When Mowed?

You have a passionate love affair with your lawnmower if you spend any amount of time in your yard. Your loyal companion aids you in combating the ills of high grass and all the troubles that come with it. However, you may question how weeds present continue to emerge even after being mowed down.

Is it true that weeds are reduced by bagging? Yes, a weed problem can be reduced by bagging weed clippings using a bagging mower. You don’t just collect grass blades when you bag clippings. You collect many weeds stem fragments and their seeds, which reduces the risk of weed seeds spreading.

Keep in mind that bagging will not be eliminating weeds from spreading. Such mowers can control weeds rather than stop them.

Besides this, you’ll find weed seeds are collected by the mower’s deck, blade, and other components. When you mow your grass later, these seeds may infect it, and then they fight for the same nutrients as your grass.

Mulching Vs. Bagging

Regular mowing keeps your lawn healthy but disposing of the clippings is a problem. The clippings from the mulching technique are usually left in the yard to decompose. Gathering the cut grass and placing it in a compost bin or a rubbish receptacle is bagging.

Grass Health

Grass clippings that have been mulched into your grass fall to the ground to decompose. As the clippings decompose, they add nutrients to the soil. When you resume mulching, it will boost nitrogen levels.

When you keep mulched clippings in place, you use fewer chemical fertilizers while preventing lawn disease.

If you bag the clippings, you may need to supplement the nitrogen concentration with chemical fertilizers. Only 1/3 of the grass’s height must be removed for best effects.

If you remove more of the blade, the grass may become stunted, resulting in larger clumps that don’t decompose as quickly, and you could end up with brown patch fungal disease.


The aesthetics of a bagged versus mulched grass are frequently debatable. Because grass clumps are invisible, some people believe that lawn bagging improves curb appeal and creates a cleaner appearance. If you let your grass grow excessively long, bagging the lengthier clippings keeps your yard appearing tidy.

Mow frequently and cut 1/3 of the grass blade to avoid stumps if you choose to mulch.

Bagged Grass Clippings For Compost

Grass clippings might be beneficial to your plants if you collect them in a bag. Many individuals will bag the clippings from the lawn immediately and put them in their compost.

However, if certain weeds are present, you may not want to use the grass clippings as compost. If you’re concerned about weed seeds spreading, dispose of the grass clippings in a unique method, but it all depends on what you’re dealing with.

grass mulch

Not Bagging Clippings for Mulch

If you don’t want to bag your clippings, you can leave them on the lawn as mulch. Mulching the grass can be quite beneficial to its general health.

This can provide the nutrients that the lawn requires to grow strong and healthy. Grass clippings decompose and add phosphorus, potassium, and nitrogen to the soil, which will have a significant effect.

When weeds are prevalent on the lawn, though, things may get a lot more complicated. If you have some types of weeds, leaving grass clippings on the lawn could allow them to spread.

Before you decide that mulching your grass is a wise option, think about your scenario. Before you can contemplate mulching your grass, you may need to kill the weeds first.

It’s critical to realize that you can’t mulch your grass if you mow it once in a while. If you let your grass grow too tall, you’ll end up with a lot of grass clippings when you mow it.

It’s possible that leaving grass clippings on the lawn will cause decay. Because of the weight of the grass clippings, your lawn may not grow properly.

It will be required to mow your lawn regularly to mulch effectively. It may be essential to mow your grass bi-weekly depending on how quickly it grows, but this is difficult to predict because growth rates vary.

Bagging Grass Clippings Takes Work

Taking the time to bag the lawn cuttings may also require more effort. You might be fortunate enough to have a lawn mower that automatically bags your grass cuttings as you mow.

However, not everyone has a mower for bagging cuttings. If you don’t have a mower that collects grass clippings as you go, you’ll have to manually collect them and deposit them in a bag.

This could add a significant amount of time to your day’s chores, making it more stressful to complete them. If you have a limited amount of time to mow the lawn, leaving the grass clippings on the lawn may appear to be the most practical option.

You could, of course, go out and buy a mower to make things easier. Also, if you have a small or medium-sized lawn, bagging grass clippings isn’t a big deal. If you don’t have such a mower, it means you need to remove grass clippings manually.

Whether this is a significant concern will probably be determined by your circumstances. It’s still something that some individuals could consider a drawback, and weeds spread as a result.

Mulching Could Spread Fungus

Mulching rather than bag grass clippings provide several potential advantages for your lawn, but it’s also crucial to know that it can spread the fungus. Mulching is not a good option if your grass has shown signs of a fungal infection.

It will be much easier for fungus to spread if grass clippings may remain on the lawn. It will also provide more opportunities for the fungus to spread.

Mulch During Specific Seasons

Paying close attention to the season you’re in is an excellent idea. Weeds will be more prone to grow during the warmer months, which implies that mulching in the spring and summer may cause more problems.

However, things are different in the autumn and winter. If you reside in an area where you have to mow your lawn late in the year, mulching throughout those months could be beneficial to your lawn. (Find the Best Mulching Lawn Mower)

Because weeds shouldn’t be growing at this time of year, mulching should be quite safe. Weeds will be less numerous and harmful if they develop in the autumn and winter.

If it sounds good to you, you could try to stick to a strategy like this going ahead. Grass cuttings should be bagged in the spring and summer, and mulched in the fall and winter.

short grass

Does Cutting Grass Short Kill Weeds?

Although this isn’t the same as whether you should bag your lawn clippings when you have weeds, the two are related in specific ways. Many people who have to deal with weeds will want to find safe solutions to eliminate weeds.

Some people believe that cutting your grass short helps with weed control. However, cutting grass short won’t kill weeds or eliminate the weed growth that is already there. When dealing with lawn weeds, though, this method can still be helpful.

It will be more difficult for weeds to spread if you keep the grass short. This might keep weeds contained in one area rather than allowing weed seed to spread throughout the lawn.

When weeds reach the flowering stage and produce weed seed heads, they spread quickly. It is not a good idea to mow your grass if you have weeds with seed heads.

All you’ll be doing is distributing the seeds, which will cause the weeds to spread all over the place. Before you mow at all, you must carefully remove seed head weeds.

You may prevent weeds from reaching the seed head stage by mowing your lawn more frequently. If you keep your grass short, young weeds and the weed stem will stay short.

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