What is Perlite?
Perlite is a naturally occurring volcanic glass that is heated to expand into lightweight, porous white granules. It is one of the most popular soil amendments used by gardeners worldwide for improving drainage and aeration.
Benefits of Perlite
- Improves drainage – prevents waterlogging and root rot
- Enhances aeration – allows oxygen to reach roots
- Lightweight – ideal for container and balcony gardens
- pH neutral – won’t affect soil chemistry
- Reusable – can be washed and reused across seasons
How Much Perlite to Use
- General potting mix: 20–30% perlite
- Succulents & cacti: 40–50% perlite
- Seed germination: 50% perlite + 50% cocopeat
- Hydroponics: 100% perlite as a growing medium
Step-by-Step: Adding Perlite to Your Soil
- Measure your potting mix into a container
- Add perlite at the recommended ratio
- Mix thoroughly until evenly distributed
- Moisten the mix before planting
- Fill your planter and plant as usual
Common Mistakes to Avoid
- Using too much perlite in moisture-loving plants
- Confusing perlite with vermiculite (they serve different purposes)
- Not wearing a mask when handling dry perlite (fine dust can irritate lungs)