Problems with Black Dyed Mulch

The Problems with Using Dyed Mulch

Who doesn’t like the look of a freshly mulched garden? Especially with the perfect dyed mulch to match your color scheme.

Whether in the home vegetable garden or the mixed perennial border, mulch is a great tool that every gardener should make use of. It has so many benefits that are too good to pass up. These benefits include:

  • Protects soil
  • Prevents water loss
  • Shades the soil
  • Adds nutrients to the soil
  • Suppresses weed growth

The right mulch can work to improve plant and soil health and build it up over time whereas the wrong ones can damage it.

It can be tempting to pick the perfect colored mulch for your garden. These days you can select almost any color, be it black mulch, brown mulch, red mulch, or other. However, you have to be careful as not all mulches are created equal.

Before you head down to Lowes or Home Depot and choose a dyed mulches because it is the perfect color, here are some things to consider. As well as tips for some great natural alternative options. You’ll be an expert on mulch and choosing the right one after this.

The Source of Dyed Mulch

Black Dyed Mulch ProblemsMany dyed mulches are made of recycled and salvaged materials which sound like a great, eco friendly idea. However, many dyed mulch products may include scraps of treated or manufactured lumber products. These products should not be recycled into mulch and contain contaminants.

They are treated with various heavy metals, like chromium and copper, to make them last longer or having binding agents and glue in them. Some other contaminants include copper, aluminum, arsenic, lead, and formaldehyde.

Potential Soil Contamination by Dyed Mulch

These toxic contaminants mentioned above don’t stay in the mulch.

These contaminants in mulch colorant will leach into the soil over time as the mulch breaks down and water washes over it. This sometimes includes the actual dyes used for the coloring, though those are often harmless.

These chemicals can exist in the soil for a long time and cause issues with plant growth. They could even end up in food grown in the soil. This is especially the case with heavy metals. Even the chemical contaminants that aren’t long lasting in the environment can greatly affect young plants and get in the way of fresh landscapes establishing proper soil life.

Water Contamination from Dyed Mulch

Adding dyed mulch to your garden that contain these contaminated products puts them out in the environment instead of properly disposed of in landfills. From there they can seep into groundwater or runoff into surface water and cause issues in aquatic environments. Human activities such as improperly used materials and industrial activity can result in lakes having heavy metals accumulate in them. This leaves the fish inedible in many cases.

Damaging the Soil Ecosystem

Dyed Brown MulchOn top of potentially being dangerous to the plants, animals, and people who interact with the mulch, dyed mulches can damage the life in the soil. Healthy soil that will grow the best plants has a complex community of bacteria, fungi, insects and worms that help give it nutrient, structure and the ability for proper water absorption.

Damaging this ecosystem in anyway is not ideal. Without soil life and the organic matter they help maintain in the soil, it is much less nutritious and the structure can break down into a dusty texture.

Dyed Mulch is Not Designed to Break Down

One of the biggest benefits of mulches is that they can break down and add nutrients and organic matter to the soil. However, dyed mulches can made of wood product that have been treated not to breakdown so they do not provide the benefit they should. Healthy soils need inputs of organic matter to help maintain their structure and water retaining abilities.

Safe Colored Mulches

If you’re still set on the perfect shade of red, brown, or black dyed mulch, look for ones that won’t damage your soil. Look for products that say they are made of untreated wood or shredded bark. Also, look for companies that advertise using safe dyes or that label their products as eco-friendly as this means they probably avoid heavy metal treated woods or toxic dyes.

For example the Mulch and Soil Council in the US will put a MSC approval on any mulch products that don’t include dangerous treated woods. Similar certification may be available in other countries.

Certified Mulch

Some mulches like cedar have a natural red color and can be a great alternative to red dyed mulch. However, they still contain lots of natural chemicals that can inhibit plant growth. These should not be used too close to edible plants or put too close to seedlings or freshly planted shrubs. One should leave about 12” of space around freshly planted shrubs or perennials. Once they are established the cedar mulch can be pushed closer.

Choosing the Best Mulch

The best choice for mulch is an organic, untreated one. There are a lot of options out there for organic mulches. You could try wood chips, shredded bark, shredded leaves, grass clippings, straw, pinecones. Even cardboard can be used as an effective mulch layer. A lot of them even have natural attractive colors to them without dyes. Not only will these make much better mulches than dyed ones, they are often much more cost effective and sometimes even free!

Dyed Red Mulch Colorant

It is easy to save your fall leaves to use in the veggie patch. In the spring and summer spread your lawn clippings around your shrubbery to prevent the lawn from growing in, and it costs you absolutely nothing.

Wood chips from down trees and branches are usually available free from your recycling depot, from a local arborist, or tree removal company. Just remember any mulch that is high in carbon, such as wood chips or straw, must be balanced out with something with nitrogen such as a fresh base layer of compost. This is because it will use up nitrogen as it decomposes.

There is also the choice of using inorganic mulches. This includes such as plastics and stone or gravel. Plastic sheet mulch can be very useful between rows of crops but you have to be careful because it does not allow moisture into the soil and it does not allow the soil to breath either. Hardscaping with stone work and gravel can be very useful as a decorative mulch but unlike organic mulches they don’t add anything to the soil and can heat up in the sun.

Cider Mill Landscapes’ Use of Mulch

Our preferred choice of mulch is triple shredded hardwood bark mulch. It is all natural, organic mulch. It provides a finer look, inhibits weeds better, and holds moisture better than lesser grade mulch. This mulch also reduces the chance of artillery fungus.

If you have a special request for a dyed mulch we will certainly accommodate. However, we only use a triple shredded mulch with an all natural dye. The dye will hold its color throughout the year and has a slow rate of decomposition. Typical dye colors are black or brown mulch.

For a completely natural look or a woodland setting, we will sometimes apply woodchips over mulch.

Your Next Landscaping Project

Ready to start a mulching your gardens or other landscaping project? Don’t forget Cider Mill Landscapes offers free landscaping consultations. We’ll happily come on-site to discuss your upcoming project and provide you with a quote and design materials free of charge. Schedule your free landscaping consultation online, or call 484.574.4666.



Landscape Design

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