Can regular potting soil work for succulents?
Written by
Julia Anderson
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Regular potting soil is a threat to succulents. Due to its moisture-retaining characteristics, it can induce root rot in these plants, which typically thrive in dry conditions. You see, porous soil can drown roots in a matter of days. This is the biggest killer of succulents (that and pests). If you purchase your soil at the store, always amend it before using it.
Material Ratios
- Mix 2 parts gritty material per 1 part soil
- Measure by volume using cups or scoops
- Adjust ratio for humid climates
Particle Size Standards
- Grit must exceed ⅛ inch (3mm) diameter
- Avoid fine sands that compact over time
- Screen materials for consistency
Drainage Verification
- Water should drain within 15 seconds
- Test in empty pot before planting
- Re-amend if water pools
Convert standard soil quickly. Mix three cups of pumice with 1.5 cups of potting soil. Once fully mixed, add a handful of compost to provide nutrients. Mix until you have a homogeneous blend. The mixture will appear like coarse gravel. Please do not use peat-heavy mixes unless they have been modified to reduce their peat content.
Test your drainage every time! Put your mix in a 6-inch pot and pour 1/2 cup of water through it. How long does it take for the drip to stop? If it takes longer than 15 seconds, adjust your ratios until half a cup of water drips out in 15 seconds. This quick check will potentially save your succulents from future root issues and keep them healthy!
Prevent frequent amendment mistakes. Avoid layering materials in the soil; instead, mix them uniformly. Avoid using vermiculite and peat moss, as they retain too much water. Do a post-amendment soil pH test. Most succulents prefer slightly acidic conditions. Refresh mixes every two growing seasons.
Read the full article: Best Soil for Succulents: Ultimate Guide
