Mulch and decorative rock both finish a bed and slow weeds. They behave very differently over time, so it helps to choose on purpose.
Mulch
- Feeds the soil as it breaks down
- Keeps roots cooler and soil moisture steady, which plants like
- Easy to adjust when you add or move plants
- Needs topping up every year or two
Decorative rock
- Lasts for many years and does not break down
- Holds a clean, sharp look
- Can run hotter next to plants in summer sun
- Harder to clear leaves from and harder to change later
How deep?
About two to three inches is a good target for either one. Keep mulch off the stems and trunks of plants, since piling it against them holds moisture where you do not want it.
Which should you choose?
Choose mulch for beds full of plants you care about, and for beds you like to change. Choose rock for low-maintenance borders, side yards, and spots where you want a permanent, clean look.
We install both. See our mulch installation and decorative rock installation pages, or ask about a full bed renovation.