Choosing the Right Potting Mix

There are four basic kinds of potting mix, but how do you know which one you need? Which is the best for long-lived plants? What's the fuss about peat? Are peat-free mixes any good? Here are the pros and cons.

Excerpted from Simple Steps: Containers for Patios
Filed under: Container Gardening

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Peat-Based Potting Mix

Also known as loamless or soilless potting mix, peat-based potting mix includes multipurpose types for seeds and general potting, and is best for short term, one-season displays. It is lightweight and well aerated, and the lack of nutrients is easily overcome by the use of slow-release fertilizers. When the peat dries out, it shrinks and can be difficult to rewet.

Advantages
- Easy to handle, being light and clean.
- Consistent, reliable quality.

Disadvantages
- Dries out quickly.
- Prone to waterlogging.
- Low nutrient levels.
- Plants need fertilizing after four weeks (seeds) or six weeks (plants).