Herbicides are a great way to deal with unwanted, pesky weeds in the garden.
However, it isn’t as easy as it sounds because there are many things to be kept in mind, for instance, the kind of herbicide to spray. I’ve been using Roundup for the past few years, and it has become my go-to herbicide now!
But if you’ve been wondering, “Can I spray Roundup after rain?” then you’re in the right place. So, read on to know more!
Can I Spray Roundup After Rain?
Does Rain Impact Herbicide?
Rain has a major role to play when it comes to the efficiency of the herbicide because it tends to wash away the chemical from the surfaces of the plants. The leaves of a plant need to absorb Roundup for it to work and kill pesky weeds.
Most herbicides mention the amount of time they need rain-free on the label for the chemical to be soaked in by the plant. This period is usually around 6-8 hours. However, Roundup is stronger than most herbicides and only needs a half-hour gap between spraying it and rainfall.
What To Keep In Mind Before Spraying Roundup?
1. Spraying Roundup Before Rain
If you’re planning on applying Roundup more than half an hour before it’s scheduled to rain, you should take note of the weather conditions as well. If there is a storm or hurricane warning, I recommend holding off on spraying Roundup because strong winds can carry the chemical to the plants you don’t intend to kill.
Thus, make sure that there’s a significant gap between rain and the application of herbicide, as the chemical also needs time to percolate into the leaves. If it rains immediately after application, the chemical will get washed away, and it will be a waste of effort.
Like I mentioned before, Roundup takes just half an hour to work, even though the label reads that the waiting time is about 3 hours.
2. Spraying Roundup After Rain
I also suggest not spraying Roundup immediately after it has rained. Applying it post-rain is akin to spraying it before the rain because the leaves are still wet irrespective of when it rained. If the rain comes into contact with the chemical, it might also dilute it, thereby making it less effective.
Hence, it is important to let the plant dry out before spraying it with RoundUp. I also advise against trying to “sneak in a spray,” basically, spraying Roundup between lulls in rainfall. This would defeat the purpose since the foliage would still be wet.
Final Thoughts
Now that we’ve reached the tail end of this guide, you know that water and herbicide don’t mix well. This also means that you should refrain from spraying Roundup even if the plants are damp from dew or irrigation.
Usually, leaves take a few hours to dry and could even take up to a day during the colder months. This can be a little inconvenient, but overall it’s a better choice because it saves not only effort but also time and money since you won’t have to spray Roundup twice.
With this, I’ll be taking my leave, and I hope to see you soon with another guide like this!