Clover is a debatable weed. I did a video on how to kill clover in your lawn and a ton of people comment that it’s great for your lawn while a ton of people thank me for helping them kill it.
It does have it’s benefits, it can help with nitrogen deficiency. But having clover doesn’t mean your lawn is nitrogen deficient either, it’s still a plant that will grow when nitrogen is available.
The problem with killing clover is two fold. The first is not every weed killer will kill it. Many of the basic weed killers aren’t strong enough to kill it. You’ll need something like Orho CCO.
The second problem with clover is it naturally repels liquids. If you spray it and the spray beads on the petals then it can just roll right off and never soak in. The secret here is to use a surfactant.
A surfactant will change the compostiion of the liquid so it no longer beads, instead it’ll spread out across the petal and soak in. There are nonionic surfactants but with Ortho CCO a simple dish soap or baby shampoo will do the trick.
With clover it’s also important to do followup applications. About a week or two you’ll want to spray it again. Just remember to use the surfactant each time. You might start to get rid of clover in your lawn and think it’s time to slack off, take the second to add the dish soap – it makes a big difference.