You’ve seen it in gardens, around trees, and in flower beds. But what is mulch, exactly? And why does it matter for your landscaping? In simple terms, mulch is a protective layer placed over the soil. It can be made from organic or inorganic materials, and it offers a range of benefits that improve the look and health of your yard.
This blog explains the purpose of mulch, its best uses, and how to use it properly in Ontario gardens.
What Does Mulch Do in a Garden?
The main benefits of mulch go beyond just appearance. If used correctly, mulch in a garden does the following:
- Retains moisture by reducing evaporation
- Regulates soil temperature in hot and cold months
- Suppresses weeds by blocking light
- Reduces soil erosion from wind and rain
- Adds nutrients (if using organic mulch)
- Prevents soil compaction from foot traffic or heavy rain
In short, the purpose of mulch is to protect and support your soil. Whether you're maintaining a mulch garden, applying mulch for flower beds, or spreading mulch for plants, the benefits are clear.
Different Types of Mulch: Organic vs Inorganic
There are two main types of mulch: organic and inorganic. Each has its own uses depending on your goals.
Organic Mulch (biodegradable):
- Bark mulch, like spruce mulch
- Shredded leaves or grass clippings
- Wood chips
- Compost
- Straw
These mulches break down over time and improve soil health. They're ideal for mulch beds, gardens, and around shrubs or trees.
Inorganic Mulch (non-biodegradable):
- Rubber mulch
- Stone or gravel
These last longer and are often used in decorative mulch projects or to block weeds in low-maintenance areas.
Both types are common in mulch landscaping, but organic mulch is better for soil health. If you're wondering what is mulch made of, start by asking what your garden needs—nutrition, weed control, or aesthetics.
How and When to Mulch Your Garden
Knowing how to mulch a garden is just as important as choosing the right material. Here’s a basic guide:
How to use mulch:
- Apply 5 to 7 cm (2 to 3 inches) of mulch on top of the soil.
- Optional, add landscaping fabric first (only where it makes sense):
In garden beds where weeds are a persistent problem, you can lay down landscaping fabric before mulching. Think of it like a weed barrier that reduces how often you need to pull or spray. It often works best under decorative mulch in shrubs and perimeter beds. It is not always ideal in veggie gardens or areas you amend frequently.
- If you use landscaping fabric:
Clear existing weeds, then level the soil. Lay the fabric flat, overlap seams by 10 to 15 cm (4 to 6 inches), and pin it every 30 to 60 cm (12 to 24 inches). Cut X-shaped openings for plants, tuck the fabric snugly around stems, then apply mulch over top so the fabric is fully covered.
- Keep mulch 5 to 10 cm (2 to 4 inches) away from tree trunks and plant stems.
- Use a rake to spread evenly and avoid thick clumps.
When to mulch garden spaces:
- Spring: Best for weed control and moisture retention
- Fall: Helps insulate soil before winter
- Avoid mulching frozen ground or when the soil is overly wet
Proper garden mulching supports plant roots and reduces the time you spend watering and weeding.
Choosing the Right Mulch for Your Landscaping Needs
Different landscapes call for different mulches. Here’s how to match your mulch to your goals:
- Use spruce mulch or shredded bark in garden beds for a natural look
- Apply compost mulch to vegetable gardens to boost soil nutrients
- Choose decorative mulch or gravel for paths or modern design features
- Use landscape fabric or rubber mulch under play areas or seating zones
- Apply organic mulch around perennials and shrubs to support long-term growth
Whether you're designing a garden with mulch or refreshing a mulch garden, selecting the right material ensures long-lasting results.
If you’re still unsure, speak with a local expert. At Michael Durham Landscaping, we help clients choose mulch based on soil needs, design goals, and property size.
Why Mulching is Essential for Ontario Gardens
Ontario’s climate includes heat, cold, and unpredictable moisture. That’s why mulching plays a key role in protecting gardens across Durham Region.
- Mulch shields soil from rapid temperature changes
- Helps retain moisture during dry summers
- Prevents frost damage by insulating roots
- Reduces maintenance for homeowners and businesses
If you've ever asked is mulch good for gardens, the answer is yes—especially here. With short growing seasons and frequent weather shifts, a layer of mulch is a simple way to protect your investment.
At Michael Durham Landscaping, we offer full landscaping services, including mulch delivery and installation. Whether you need organic mulch, mulch for flower beds, or advice on what is mulching, we’re here to help.
Contact us to request a quote or schedule service in the Durham Region.