dandelions and clovers

 Every spring I have a patch of Clovers and Dandelions. Every Spring I
put down a broad leave herbicide; they all die off. Then the following
spring I do the same thing all over again.  How can I end this cycle of
them coming back?

 
Usually, having lots of weeds of any type is symptom of a lawn that is
not thick and dense.  If it is, it will block out most weeds on it's
own.  Still you will always have some, but they should be easily
treated with some minimal herbicide applied via a tank sprayer.  That
minimizes the herbicide, which is better for the environment.

I'd start by analyzing what kind of grass you have and what shape it's
in.  Aerating, overseeding, proper fertilization, PH, etc could be
appropriate steps to not only help keep the weeds out, but make it
look better too.

 trader4@optonline.net wrote:

I aerate every fall and over seed, I use Lesco Team Mates seed and my
yard looks like a thick shag carpet.  I have no other issues with the
lawn other then what I said in the OP.  Honestly, my yard looks better
then EVERYONE else's in the neighborhood and most of them use a
landscaper (Except for right now)

 

Do you fertilize?

I haven't aerated or overseeded in 15 years, and my lawn does fine with
fertilizer and lime. A few times a year I walk around with a spray bottle of
weed-b-gon - spray the weeds, and that takes care of them.

 

No one has mentioned "neighbors" yet as a contributing variable.  If
none of your nieghbors do anything to handle dandelions in their
yards, then you'll be fighting them in your yard every year.