How Long After Seeding Can I Use Weed And Feed

Even if you are a beginner or expert gardener, one aspect that you will want to achieve is to have a magnificent weed-free lawn. A reader is wondering about combining overseeding and feeding a lawn in the autumn. overseed and feed, or feed later. Find out the answer and more … Crabgrass preventer helps prevent crabgrass from growing but it can wipe out your newly sown grass seed. Learn how Green Giant gets the job done correctly.

How Long Does Scotts Weed and Feed Take to Work?

Even if you are a beginner or expert gardener, one aspect that you will want to achieve is to have a magnificent weed-free lawn.

However, you might realize that you need to get high-quality lawn fertilizer to get such a lawn.

That is where the Scott Weed and Feed play a role in feeding your lawn and handling all weeds.

By reading this guide, you can know how long the Scotts weed and feed takes to work.

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How long does Scott’s Weed and Feed take to work?

If you choose the appropriate product based on your week and grass type, it can take between four days to one month to notice full results, especially if you apply it in the growing season.

However, the fertilizer components will start to start between one to five days.

When to apply the Scott Weed and Feed?

Scott has two week and feed products, including the Scotts Super Bonus S Weed and Feed and Scotts Lawn Pro Super Turf Builder.

You can only use the Scotts Plus 2 twice during the growing season, especially when the dandelions and other weeds grow.

However, you can apply for the Super Bonus at any time when the weeds are growing.

Ensure you read the instructions on the packaging label because the products can be detrimental to certain types of grass, and you should not use them often.

Timing is important when it comes to eliminating weeds.

In particular, you can have the appropriate tools and product, but if you apply the Scott weed and feed at the wrong time, it might not have any effect or can result in a limited effect.

For instance, the weekly killer cannot be effective, especially during extremely hot or excessive cold conditions.

The labels on the product indicate that it can be more effective when you apply the weed and feed in late fall, early fall, late, and early spring.

Further, if you want to achieve the desired result, you need to follow these tips when spraying the Scott weed and feeding it in your garden or lawn.

  • Ensure you spray the weekly killer when the temperatures range between 60°and 85° Fahrenheit to optimal effectiveness.
  • Do not apply the weed and feed on days with excessive winds because wind can make the weed killer dry quickly, hindering it from being absorbed.
  • Mowing is discouraged for appropriately 48 hours after application. In other words, you need to wait between 2 to 4 days after applying the product to protect your grass.
  • Do not apply the product if it has been predicted to rain within the next 24 hours. In particular, rain can wash away the active ingredients in the products before they are completely infiltrated into the plant system.
  • Ensure your lawn has a normal height of an appropriate 3 to 5 inches.
  • Do not try to water your grass, lawn, or garden for around 24 hours after the application.
  • Ensure you apply the product early in the morning for easy absorption when photosynthesis occurs during the day.
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How do you know that the Scotts Weed and Feed is working?

After applying your weed and feed, the following signs can help you know that it is working as intended.

  • Your grass is supposed to appear to grow faster and thicker between the first day of the application and after around six days.
  • After one week, the weeds are supposed to start wilting and yellowing
  • After two weeks, most weeds in your garden or lawn are expected to have turned brown, died, or you can easily remove them using your hand.
  • After one month, most weeds will have died, and your grass will become more lush and green.

Where you should use the Scotts Weed and Feed

The Scott weed and feed is appropriate to almost all kinds of lawn grass species.

The product is not appropriate for plants that produce food or ornamental plants, including vines, fruit trees, and vegetable plants.

Also, the labels claim that the fertilizer cannot burn your grass, provided you apply it according to the instructions.

If your grass is dry, you can water the lawn one day before applying the weed and feed it to prevent it from burning grass.

How does the Scotts Weed and Feed work?

As the name indicates, the Scott Weed and Feed comprises two major ingredients, including fertilizer and weed killer.

The granules of weed killers will be absorbed after they have settled on weed leaves but slide from the grass blades.

In particular, the weed and feed product work by inflicting root damage resulting from weeding dying or preventing the production of protein by limiting photosynthesis.

At the same time, the fertilizer element of the product increases healthy grass blade growth, resulting in a more dense lawn.

Therefore, your grass will be left nourished by fertilizer when the weed killer eliminates the weeds.

What the Scotts Weed and Feed kills

The weeds and feed work best on broadleaf weeds, including spurge, henbit, plantains, knotweed, chickweed, and dandelion.

However, you might be required to use another product to eliminate crabgrass and weeds that have narrow leaves, making it challenging for the weed and feed granules to settle.

How often should you apply it?

You should not apply the Scotts Weed and Feed product more than twice per year.

For instance, if you applied the product in spring but did produce the desired results, it could be safe to undertake another application in the fall season.

Most importantly, ensure your applications are at least two months apart to prevent the build-up of chemicals to detrimental levels because they can kill your yard vegetation.

Although you can apply the Scott feed and weed at any time because it is a pure fertilizer without added pesticide, weed killers, and other chemicals, it is best to follow the instructions indicated on the label.

The Scotts weed and feed is designed to feel different kinds of lawns to boost the healthy growth of grass and quick greening.

Thick and healthy grass might need limited additional watering to kill several weed species.

By reading this guide, you can know how long the product takes to see the results.

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Question: Overseeding and feeding a lawn?

I received this question in August 2017 from a reader called Max. He is wondering about combining overseeding and feeding his lawn.

I am a complete beginner with lawn care and am sorting out a neglected lawn.

The lawn was fed in mid July and is going to be fed again 10-12 weeks later as recommended on the feed bag.

I am wanting to do some over seeding and I believe September is the best time to do this. I have read though that you should feed the lawn when you over seed so my question is if i overseed in September should i feed it early at the same time or overseed and just do an autumn feed in October as planned.


Thanks for the question Max.

It seems that have a good lawn care regime and are feeding the lawn regularly. Well done.

Overseeding a lawn should not interfere with a lawn fertilisation programme. You say that you fed the lawn in July and that the feed will last 10-12 weeks. I do not recommend feeding too soon or you risk over feeding your grass.

Therefore overseed your lawn as in September as planned. It is the best time of year to get new grass established. The new grass does not need any additional feed for the first few weeks of it’s life anyway as everything it needs to grow initially its contained within the seed. However, an autumn feed in October will help it to gain nutrients to put down a good root system and stay strong over the winter.

Overseeding and feeding: Things to note

If you are planning on overseeding and feeding a lawn, take note of the following:

  • Do not put down a herbicide soon overseeding your lawn. Most lawn herbicides advise leaving at least 6 weeks before application on new grass. Read the label. Avoid weed and feed mixes. New grass is very vulnerable and a herbicide applied too soon may kill it. If in doubt, just stick to feed only. Any weeds can be dealt with in the spring.
  • Be careful on new grass. If your grass is not ready for mowing, it is probably not ready for feeding. New grass is fragile, so make sure it is strong enough to be stepped on before walking all over it to feed it. If in doubt, just keep off it. The grass will be fine allowing a few more weeks to toughen up.
  • New grass benefits from Phosphorus. Applying fertiliser with some extra ‘P’ will help the new grass establish a good root system and aid cell division.

Follow these tips and you will have a lovely thick lawn for the following spring.

Can I Seed My Lawn and Use Crabgrass Preventer this Spring?

Many lawns take a beating over the winter and a nice aeration and over-seeding treatment can work wonders to give you a beautiful lawn all summer long. However, crabgrass is also a concern on lawns.

Crabgrass is the most common lawn weed in Pennsylvania and it is primarily controlled with a crabgrass preventer – which prevents the crabgrass seeds from sprouting.

So, will crabgrass preventer keep my new
grass seed from sprouting?

The crabgrass preventer absolutely can wipe out your newly sown grass seed – for this reason, it is very important that the work is done correctly.

Options to Treat Crabgrass Without Harming new Grass Seed

Note: the information below only relates to the crabgrass preventer that we use on our customer’s lawns at Green Giant. Other materials may or may not give the same results.

The options are listed in the order we consider the most preferred to the least desirable.

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Option 1:

  • The fertilizer & crabgrass preventer get applied first
  • Allow the materials time to settle into the soil for at least a few days (preferably with some rain)
  • Then perform the aeration and over-seeding

This process has been studied extensively and the results consistently show that the crabgrass preventer has very little, if any, adverse affect on the good grass seed.

Option 2:

  • First, aerate and over-seed the lawn early in the spring, as early as possible (which is usually when the soil is dry enough)
  • Wait until the majority of the grass sprouts are at least 1-2 inches tall
  • Apply the crabgrass preventer

This process should eliminate any risk of the crabgrass preventer harming the grass seed (since the grass has completely emerged from the seed). The down side can be that the process starts later in the season if the aeration & seeding is delayed. This is ok but it might mean more watering as we get into the summer.

Option 3:

  • Skip the crabgrass preventer
  • Aerate & Over-Seed the lawn
  • Treat crabgrass preventer with a post-emergent spray (after the plant is visible in the lawn)

Although crabgrass can be controlled with a “post emergent” material after the plant is growing, it is less effective (especially in hot, dry weather), more expensive and can damage surrounding good grass. Crabgrass preventer is considered to be the most critical component for effective crabgrass control. If possible, we recommend going with option 1 or 2.

What NOT to do

  • Do not spread seed on the ground, then apply crabgrass preventer. This will be a disappointment because most of the seed will not survive.
  • DO NOT aerate and over-seed then apply crabgrass preventer before the new seed has grown completely out of the seed. This will also lead to a failed seeding effort.

We are always here to help, contact the experts at Green Giant Home & Commercial today for your free quote!

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