Hey guys! I’m Amber from DoMyOwn.com
and today I’m going to talk to you about pre-emergent herbicides and why should
put them down in the fall. There’s a whole host of other weeds that will
germinate across the fall and winter months… weeds like poa annua, chickweed, and a variety of others are gonna pop up in your yard in the spring if a
pre-emergent isn’t used in the fall. Using one in the fall also helps make
sure that you save time and money. It’s important to get a barrier down in the
fall to make sure that you’re getting ahead and keeping your lawn healthy for
the next season. You may want to look at doing a split
application as well depending on the temperatures in your area and what kind
of weed control you’re looking to achieve. We have a great video on how to
do split applications that you can see on our site, and this will show you
exactly why it’s important and how to do this step by step. Basically the short
version of it is it’s going to help extend your weed control and give you a
much healthier and nicer looking lawn all season long. When should you apply a
pre-emergent herbicide? There’s typically two times a year that we’re gonna focus
on: spring and fall. Now as we go into the fall season you’re going to start looking for temperatures to drop between 80, 70 and going lower. You can use a soil
thermometer to test the temperatures in your area to make sure that you’re at
the right time and get your application down for the best results. Now, for the
fall a lot of times these temperatures are going to range around the August and
September timeframe. This is when you want to start looking
to put down your first pre-emergent application especially if you’re
planning to do a split. Split applications are normally going to be
done about five to eight weeks apart so you’ll want to make sure to keep that in
mind and mark that on your calendar if you start doing your pre emergent
application soon. Some of you are in areas of the U.S. that never really seem
to get cold. It’s just kind of just… hot all year round. In that case, your pre
emergent window is going to be a little bit wider than most. Areas like Arizona
and Florida often run into needing to put a pre-emergent down later in the
season, potentially even closer to October and November to make sure that
your barrier really lasts. UV rays and lots of rain can break down your product
so you want to make sure that you’re getting a good application down to
sustain any weather that mother nature might throw at your yard. What do I need
to know to make sure I’m choosing the right pre-emergent for my lawn and my
needs? The first step which is the most important is finding out what type
of lawn you have. You want to make sure that you’re using products that are safe
for your grass type. If you don’t know your grass type, you’re welcome to send
in photos to our team to try and identify it or you can pair up with your
local Master Gardener’s office to find out the turf type in your lawn or in
your area. The next most important step is going to be finding out what weeds
you have. Knowing this is crucial to make sure you’re choosing the right selective
herbicide for your needs. You want it to be safe for your turf
type and you want to make sure that it’s going to control everything that you
have. Pre-emergents, like we mentioned before, are going to prevent weeds from
coming up so if you do have something in your yard currently you want to look at
some of our selective herbicides for post-emergent control currently. When
doing applications, you want to make sure that you’re being careful and following
all the label instructions, being sure to follow all of that PPE that’s
going to be listed things like gloves, closed toe shoes, long pants, and any
other directions that it may provide to make sure that you stay safe and so
does your lawn. There’s a ton of different pre-emergent options out there…
there’s liquids there’s granules and we get asked which one should I use? As far
as the application goes, you can choose granular or liquid: whatever meets your
needs. With products like granular pre-emergents, you’re going to want to make sure that you calibrate your
spreader before your use and make sure that it’s going to deliver that even
application that you’re looking for. You’ll want to make passes back and
forth in your yard trying to get as much of an even coating as possible. Be sure
to sweep any granules that may land on concrete areas like sidewalks and
driveways back into the yard, rather than washing them off, to be sure that no
herbicide is going to stain any of the areas around your home. For liquid
applications, we recommend going with tank sprayers. This is going to ensure
ultimate accuracy across the yard and make sure that you’re getting a good
even application. You can use an approved tank mix post emergent herbicides with your pre-emergent at the same time. This will help eliminate the weeds
that are currently there while your barrier of your pre-emergent is getting
you ready for the following season. For some of you that may be using herbicides that you’re just not really comfortable with or you’re not sure that you’re going to get your application even you can add in a marking dye with your solution to make sure you can see where you have applied. Marking dye will
normally fade within about one to two days at most and it’s not going to stay
in any of your yard and change the color of it. It’s just going to help you see
where you’ve applied so you don’t overlap and do too much herbicide in the same area. Again, there’s tons of options out there
as far as what pre-emergents you can use. Some of the most popular ingredients out
there are dithiopyr, pendimethalin and prodiamine. Out of those ingredients we
typically recommend one like the dithiopyr in the spring because it’s
great on crabgrass and really helps get a lot of those spring weeds controlled very well. For the fall, we tend to recommend ones that have pendimethalin
in them. They work great to prevent poa annua and a variety of other weeds. If you liked this video, make sure you head over to our channel and hit that subscribe button. And check out our other how-to and DIY videos. Thanks for watching!