One of the best reasons to consider rubber mulch is the fact that it acts as a weed barrier. Every day in our nursery someone comes by frustrated with weeds in their landscape or turf and they are looking for solutions. Everlast will help prevent new weeds from appearing but existing weeds and weed seed do need to be dealt with properly for best results.
There are many forms of weed killer. Weeds that have already sprouted need to be treated with a post-emergent product. Weeds that have yet to sprout need to be handled with pre-emergent weed killer. Chemistry varies between products but Roundup or equivalents seem to be the go to product for many homeowners looking to kill existing weeds; but they are often frustrated by poor results.
Glyphosate is the active ingredient and you can think of it as suntan lotion for green leaves. It prevents the plant from utilizing the sunlight. It is imperative that this type of product be applied when the plant is growing because that when it needs the most energy. Applying weed killer too early in the season will not yield the best results. Persistent tougher weeds may need to be coated more than once and I recommend 7 to 10 days between applications. Some products contain a small percentage of diquat which is my favorite.
Yesterday a young lady came in complaining of dollar weed that seemed to be unaffected by the products she was using. I have had great success using Roundup Quick Pro that contains just under 3% diquat. I re-apply once the dollar weed starts to yellow and have had good luck keeping it under control. When the dollar weed is in my turf I have to be very careful applying the product as it is non selective meaning it will affect nearly all varieties of plants not just the dollar weed. My turf suffers a bit if I am not too careful but the results are worth it to me as the dollar weed gets the worst of it.
A quick note on Everlast and weed control with rubber mulch. Our products stay dry. Weed seed that blows into the beds gets trapped in the rubber which is why we recommend a 2″ depth. All the water runs through the mulch since it never mats like rotten wood mulch. We don’t recommend a weed fabric so organic material is never trapped in the mulch-weed seed won’t find any moisture above grade. It is just that simple.