When is it too late to spray for weeds

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Weeds are a difficult problem for many homeowners. They can take over your lawn and garden, making it impossible to enjoy the beauty of what you have worked so hard on. If this sounds like a familiar situation, then you should be aware that there is an optimal time to spray for weeds that will help prevent them from coming back later in the season. In this blog post we’ll discuss when it’s too late to spray for weeds and how to get rid of them before they start taking over!

When is it too late to spray the weeds?

You should never wait until weeds have already taken over your yard. They will be hard to get rid of, and you will put yourself in chemical danger if you try to spray them in their own territory. Also, waiting a long time means that more time has passed since they appeared. Such neglect can only be handled by professionals of their trade, who can help you remove the weeds in a certain amount of time. It will depend on the type of weed here.

When is it too late to spray the weeds?
Photo from @belfastgrasscutting

If we are talking about the time of year, about what is still a late date for spraying, there is no clear answer. Everything will depend on the type of weed, because some like frost and can bloom even after the first frost. This can be prevented by following a clear weed spraying plan, where it is also important to choose a quality weed killer.

When is the best time to spray out?

When is the best time to spray out?
Photo from @jrb_landscapingand

The best time to spray weeds is at the beginning of their growth period. This will make it easier to kill them and prevent them from coming back later in the season. There are different types of weed killers, some can be used on certain plants or lawns, while others cannot be used directly on certain areas, such as streams.

Still, experts agree that it’s best to kill weeds twice a year: in the spring and fall. In the spring, you can do it using several methods:

  1. The first is pre-emergent eradication, where special weed killers are used, fighting weeds during their development from seed. This method works perfectly and quickly, but if you do something right, you can see the result only in the fall. If the weeds sprout in the fall, then the treatment was unsuccessful.
  2. The second is this method of dealing with weeds that have already grown. A lot of different means are used here, which are easy to find in the gardening store.
  3. Autumn is almost a deadline for the treatment of the plot from weeds, but even here everything is ambiguous. After all, there are some types of weeds that love the cold.

What to spray weeds with?

What to spray weeds with?
Photo from @chris_watts_forester

Weeds can be sprayed in different ways. If there are very few weeds, you can do it yourself, using household tools and equipment: sprayers and brushes. But if the area is overgrown with them, for example, after mowing the lawn or cleaning beds of vegetation, you will need professional help. There are different types of exterminators available for sale, including those with added chemicals and those that are safe. The former are used in difficult neglected situations, or when the weeds are not amenable to other means. These types of eradicators will be able to kill not only the weeds, but also all the vegetation that will be around.

The safe ones, on the other hand, will be able to keep the beautiful green grass on the lawn and kill the weeds. But only these types don’t work on all weeds.

Timing of spraying for a particular type of weed

It’s important to know which weed we’re talking about, because each one has a different growth period and requires a different method of eradication.


Photo from @jamespanteri

Some perennial weeds, such as dandelions or wild garlic, can be treated in the fall. You need to get to them with a special tool, and then use herbicide on the leaves of that weed a week later. The roots should remain intact, because even if you destroy all parts of the plant, new ones will quickly grow back.

But recent experiments have led to the fact that the control of such weeds can be carried out even after the first frost. So do not worry if you do not have time to do the treatment in time. In such a case, it is important to use herbicides, but only if the temperature does not drop below 10 degrees at night. Here it is important to add adjuvants or vegetable oil concentrate to ensure better absorption of the weed killer.

Mare’s tail

Mare's tail
Photo from @elementknotweed

This weed is not common, but it can be dangerous to the health of your lawn. Treatment against mare’s tail should be carried out immediately after the flowers appear on the stem to prevent the formation and reproduction of seeds.

But treatments at later stages, such as November, are also possible. Experts note the good effectiveness of exterminators with the active substance chorimuron. It will help keep the growth of mare’s tail under control until spring. But in some regions of Pennsylvania, the Midwest and Delmarva, mare’s tail is resistant to such a substance. That’s why it’s important to double-treat here: in the fall and then in the spring. It is very important to pay attention to the instructions for weed killers, because some of them can cause crop failure in the following year.

Common chickweed

Common chickweed
Photo from @wildfooduk

Plants of this species are poisonous, although not deadly. To prevent children from playing with them on the lawn, treat it as soon as it appears on the surface of the ground. But in addition to herbicides, even household vinegar (diluted 50/50) can be used to control weeds like bristlegrass. Experts single out Haromni Extra, an exterminator that will work well during the warm season. But unfortunately, its effectiveness decreases as the temperature drops. Therefore, it is important to treat this type of weed in the warm season.

Nicolas Wayne

Gardening and lawn care enthusiast

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