The best places for rubber mulch are playgrounds for fall safety, horse arenas for impact absorption, and around trees/bushes (not edibles) where you want durable, pest-resistant ground cover that doesn't need replacing often, as it excels in high-traffic areas, around structures, and for long-term landscaping where aesthetics and low maintenance matter most, avoiding vegetable gardens where it can get hot and doesn't enrich soil.
Its shock-absorbing properties help to minimize the impact of falls and prevent serious injuries. In addition to playgrounds, rubber mulch can also be used in gardens and landscaping. It is an excellent alternative to traditional wood mulch as it does not decompose, fade, or attract pests.
Cons of Rubber Mulch
Rubber mulch can also get very hot in the sun. This can be problematic for plants that prefer cooler soil temperatures. Additionally, there are concerns about the potential leaching of chemicals from the rubber into the soil.
Rubber Mulch will not decompose. If fading begins after at least 12 years, you can either top-dress it with fresh Rubber Mulch or till it into the soil. Rubber Mulch is safe to till into the soil because it is nontoxic and acts as an aerator to help keep the soil from compacting.
Other risks include: High Heat Absorption: In sunny locations, dark rubber mulch can get extremely hot, transferring heat to the soil and potentially damaging the roots of delicate plants.
It Suppresses Weeds
One of the primary jobs of mulch is to keep weeds at bay, and rubber mulch does this job admirably. As long as you add a thick layer of rubber mulch over your garden, it will block sunlight and prevent weeds from germinating, killing them before they can grow and spread.
Mulching Around Plants
Thin, fine particles such as shredded bark or compost typically make the best mulch for plants. Spread the mulch at a thickness of no more than three inches around the base of plant, being sure to leave about one to two inches of space near the stem.
Rubber mulch is known for its impressive longevity. Reputable manufacturers often offer a guarantee of 10 to 12 years on their rubber mulch products. This is significantly longer than organic mulches, which might need to be replaced annually.
Rubber mulch is a productive landscaping material to use around foundations and keeps growing in popularity. While rubber may not be your initial thought when you hear the term mulch, rubber mulch makes an excellent landscaping product.
Since rubber mulch is made from ground-up tires that tend to be heavier than organic wood mulch, it won't typically blow away or be swept away by heavy rain or wind, whether it's used as a playground surfacing material or as a landscaping component.
Unlike organic mulches such as wood chips or bark, rubber mulch does not provide a food source for insects, rodents, or other pests. This means you're less likely to see ants, termites, or mice making a home in your playground when you use rubber mulch.
Finally, avoid large, bark type mulch or big wood chips. Since these big pieces take a long time to decompose, and they end up depriving the soil and plants of nutrients.
Despite its benefits, rubber mulch has some drawbacks. It's non-organic, so it doesn't decompose to enrich soil with organic matter. Rubber mulch may contain chemical residues, potentially harmful to plants, with zinc being a common concern.
Cons of Rubber Mulch
Install Landscape Fabric Barrier. Placing a landscape fabric as a separation barrier between your mulch and dirt is crucial. One of the most important parts of keeping your mulch bed looking new is preventing weeds from germinating. A landscape fabric or weed block reduces the amount of upkeep you have to do.
One pervasive rubber mulch myth is that, as temperatures rise over 100 degrees fahrenheit, rubber mulch will begin to noticeably smell. But it's just that: a myth. The temperatures needed to produce a “burning rubber” odor or vapor start at far higher (around 1000 degrees fahrenheit) than the heat of any sunny day.
When mulching around trees and shrubs, don't pack it against the trunks and stems, where the moisture and wood-decaying organisms in most mulches can rot bark. Pay extra attention around the base of trees and shrubs.
What to Put Around the Foundation of Your House: Risk Free and Looks Great
Because it doesn't absorb water, rubber mulch inhibits the growth of unwanted weeds and fungus that can harm plants. Weed seeds need a moist environment in which to germinate. The rubber mulch's dry environment causes the seeds to dry out and die before they have a chance to germinate.
Removing mulch before putting down new mulch is typically not necessary. Good mulch breaks down over time and adds nutrients to the soil. The best way to lay over old mulch is to rake the area flat before you start.
Rubber mulch has a typical lifespan of 7 to 20 years or more, making it one of the longest lasting mulch options. It doesn't rot or attract pests, and its low absorption rate means water drains quickly. Rainbow Mulch is made of a closed-cell sponge rubber, so it maintains its original shape and performance over time.
Ideally, you would apply mulch in the spring after the soil has warmed and before weeds have emerged, but you can apply mulch anytime of the year. If you apply before the ground has thawed, it might delay your soil warming in the spring—but if winter is when you have time to apply mulch, then do it in winter.
You should not fill a raised garden bed with junk (plastic, tires, trash), untreated soil from your yard (it compacts), fresh wood chips (they steal nitrogen), large rocks (block drainage), or pressure-treated wood (toxic chemicals), to ensure good drainage, nutrient-rich soil, and healthy plant growth. Focus on organic matter like compost, aged manure, and quality topsoil for the best results, creating a well-draining, fertile environment.