If you find that the weeds are recurring past the 6-8-week mark, you may wish to consider using a selective herbicide to spot spray your weeds. Some weed killers such as glyphosate (Roundup) kill more than just weeds, so it is important to not apply these as if they are not done precisely, they can kill your grass. Shop bought selective weed killers will recommend when to apply their product and how often and you should read the instructions thoroughly and adhere to them.
In short, here’s what you should do if you encounter weeds in your newly seeded lawn:
Although this can be frustrating and we can appreciate that a quick solution will be desired, the good news about these types of weeds is that they are largely shallow rooting and should come out with the first mow at the 6-8 week mark after sowing. If they don’t, they should be easy to pull out of the turf.
However, you can get rid of these weeds just as fast as they have appeared.
The important thing to remember when new weeds appear in your newly sown lawn is not to act hastily – do not apply a Feed, Weed and Moss Killer type product of any kind on a newly sown lawn.
If you find that when the lawn is at least six months old and has been taken over by weeds or moss, you can use a Feed, Weed and Moss Killer product.
You can lessen your watering as your newly seeded lawn patch becomes more established, but it depends on the weather. Watering every day after germination can lead to overwatering, resulting in your seed becoming rotten and its root growth inhibited.
The seed you choose is essential here because you want to choose seeds that won’t contain any weed seeds. By selecting seeds that are free of any other seeds, you avoid the possible spreading of weed seeds while you are seeding your lawn.
5. Ease up on watering after germination
It is crucial that you read the packing when you are looking at seeds. Reading the packing will enable you to know what the contents are, and you should look for seeds that are labeled “weed seeds 0%.” Some packaging will describe weed-free seeds as “other crop seeds 0%”.
Healthy grass that is flourishing doesn’t leave any space for weeds to creep in. It is true that when your seedlings are barely just sprouting, they can’t do much against the weeds themselves. However, by proper nurturing, they will grow quickly and healthily, and before you know it, there isn’t any space left for weeds to fester.
1. Your Seed Selection is Key
You can think about using weed killer after giving your lawn enough time to mature, allowing for at least two mowings. If you encounter issues with broadleaf weeds like dandelions, this is the right course of action to take now.