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putting out grass seed on existing lawn with weeds

For best results, the mixture needs to be moist and spread evenly over the target areas.

Mix the seed in a bucket with equal proportions of a suitable carrier such as general purpose compost and sand; a light garden soil could be used but would need to be sterilised in order to eliminate the numerous weed seeds liable to be present.

Keep off the newly over-seeded area if possible until new seedlings are firmly anchored.

The area to be over-sown should ideally be closely mown and then scarified or in some way prepared in order that the seeds can be carefully incorporated into the surface mineral soil – bypassing any ‘thatch’ or organic matter present at the surface.

Select a suitable mixture of grass seed using the Lawn UK lawn wizard.

You can overseed at other times of the year. Spring (March – May), is also a favourite time for overseeding. Just remember grass seed germination relies on two main factors – soil temperature, and moisture. Grass seed needs soil temperatures to be at least 7-8 degrees celsius, and frequent rainfall is important to ensure the seed germinates. See also: How long does seed take to grow.

The lawn will benefit from a mowing immediately the original grass has recovered, e.g. when it is 5-8 cms (2-3 inches) at the most but not before the seedlings are firmly anchored.

2. Secondly, you must remember to trim down the existing grass before you begin to overseed. The new seeds already have to face the challenge of competing with the well established grass plants and any existing weeds. So, bring the lawn down to a length of an inch or so and remove the cut clippings, to ensure that the new seeds come in contact with the soil otherwise they will not germinate.

1. Your selection of seeds for overseeding (see: choosing the best grass seed) holds a lot of importance as it needs to blend in with the existing grass completely. You can choose to go with the same grass type as is already laid but for a plusher effect and if you don’t like the appearance or behavior of the existing grass then blend in grass seeds of other grasses.

4. Spread the seeds evenly over the main lawn, taking care to add more in areas that are bald. If your lawn has larger areas that are bare, then it is best to choose a similar species mixture. Once the seeds have been scattered, water the area generously 3 – 4 times a day for the coming week so that the seeds remain nice and moist and can germinate easily.

Top tips for overseeding:

Overseeding is a simple process of adding seeds to the lawn to improve its quality and appearance. While seeding, the gardener adds grass seeds to the prepared soil in order to grow grass from scratch; on the other hand, overseeding is when the gardener scatters grass seeds onto a pre-existing lawn. Overseeding is generally opted to improve the look of a garden that has developed patches of empty or browned spaces and to thicken the grass to increase its overall density which resultantly has a positive effect on its appearance.

As time passes, the condition and the quality of the grass deteriorate. Symptoms like dry or barren patchy areas, abundance of weeds and generally wilted grass blades start to make their appearance. To counter this condition, fertilizers are added so that proper nutrition can accelerate growth and quality. With that, excessive watering of the grass is also needed and the weeds have to be pulled out.

The process of overseeding a lawn can turn out to be very beneficial both for the appearance and the health of the garden. However the average homeowner is either not aware of its importance or cannot make out the difference between seeding and overseeding. Before discussing how overseeding can be done effectively, lets understand what overseeding is and how it can be beneficial.

5. Once they have germinated provide them with a good fertilizer, and mow down the complete lawn once the length has exceeded 2 ½ inches.

If your lawn is looking worse for the wear with bald and brown spots and pesky weeds growing throughout, it may be to start over and establish a new lush lawn. Use a grass removal tool to help remove the old lawn, prepare the soil and re-seed or re-sod your yard.

Smother the existing lawn by covering it completely with plastic that blocks the light, newspaper or cardboard. It may take several months for this method to work, but the heat under the plastic and lack of light will kill the grass and other weeds while allowing the organic material of the dead grass to stay in the soil.

Remove the Existing Lawn

When applying the seed, lay down half in a north-south direction and the other half in an east-west direction with a lawn spreader. Press the seeds into the soil using a water roller. Finally, water the seeds gently to avoid washing them away and cover them with straw.

Finally, smooth out the lawn with a rake and use a water roller to firm the soil. This step ensures a level soil bed without compacting the soil.

Perform a soil test to determine what soil amendments are needed before planting. Fill in any low spots and make sure the yard has a 1 to 2 percent slope away from your house or other buildings, advises the University of Maryland Extension. Remove any rocks, weeds and roots and break up large clumps of soil.