Perlite is a lightweight mineral used to improve drainage and airflow in potting soil. Its porous white particles create small spaces inside the growing mixture, allowing excess water to leave while air reaches the roots.

This horticultural-grade perlite is imported from the Gulf and prepared for use with plants. Mix it with soil, coco peat, compost or other potting ingredients for containers, grow bags, seed trays, succulents and plant cuttings.

Why Use It

• Improves drainage in heavy potting mixtures
• Creates air spaces around plant roots
• Helps reduce soil compaction in containers
• Useful for succulents, cacti and indoor plants
• Keeps seed-starting mixtures light
• Does not rot or decompose like organic materials
  

Perlite is sold by volume because its weight can vary with particle size and moisture. Select the pack according to the amount of potting mixture you need to prepare.

Product Details

Perlite does not provide meaningful plant nutrition. Compost or a suitable fertilizer may still be required according to the plant and its growth stage.

Mixing Guide

These amounts are starting points. The correct proportion depends on the other ingredients, the plant’s moisture needs and how quickly the container currently drains.

How to Mix

1. Place the required soil, compost or potting medium in a clean container.
2. Lightly dampen the perlite if it produces dust while being poured.
3. Add the required proportion of perlite.
4. Mix thoroughly so the white particles are distributed evenly.
5. Fill the pot and water slowly to check that excess water can leave freely.

Perlite works best when mixed throughout the root area. A layer placed only at the bottom of a pot does not correct a heavy or compacted mixture above it.

Pots and Bags

For regular pots and grow bags, combine one part perlite with approximately two to three parts soil, compost or prepared potting mix.

This is useful when garden soil becomes hard inside containers or stays wet for too long after watering. Perlite keeps the mixture more open without adding unnecessary nutrients or changing the feeding programme.

Always use containers with open drainage holes. Perlite can improve the mixture, but it cannot release water from a pot with blocked drainage.

Seed Starting

Mix 20–30% perlite into a light seed-starting mixture. This helps maintain air spaces around delicate new roots and prevents the growing medium from becoming tightly packed after repeated watering.

Perlite drains quickly and does not hold as much moisture as vermiculite. Check seed trays regularly because small cells can dry faster, particularly during warm or windy weather.

Cacti and Succulents

Succulents and cacti generally need a faster-draining mixture than leafy indoor plants. Combine perlite with a suitable cactus and succulent potting mix.

Perlite may form 40–50% of the mixture when the remaining ingredients hold considerable moisture. Reduce the amount if the pot already dries too quickly or the plant is exposed to intense rooftop heat.

It is useful for aloe vera, jade plant, snake plant, echeveria, adenium and many common cacti.

Plant Cuttings

Perlite can be combined with coco peat, peat moss or another clean propagation medium when rooting cuttings. The open structure allows new roots to receive air while the moisture-holding ingredient prevents rapid drying.

Place cuttings in a clean container with drainage holes. Keep the mixture lightly moist without leaving it soaked.

Heavy Soil

Adding perlite can improve the texture of garden soil used inside pots. Mix it evenly through the soil before planting instead of scattering it over the surface.

For compact ground beds, a small quantity of perlite may have limited effect. Improving the soil with compost and correcting drainage may be more practical for a large outdoor area.

Perlite or Vermiculite

Perlite and vermiculite perform different jobs in a growing mixture.

Perlite creates more drainage and air space, making it useful for plants that dislike wet soil. Vermiculite retains more water and is useful where the growing medium dries too quickly.

They can also be combined. This provides moisture retention from vermiculite and additional drainage from perlite.

Local Tips

• Use more perlite during humid or rainy conditions when containers remain wet for too long.
• Check small pots more frequently during hot and windy weather because airy mixtures can dry faster.
• Raise rooftop pots slightly so rainwater can leave through the drainage holes.
• Mix perlite through heavy nursery soil when repotting indoor plants.
• Water slowly because dry perlite particles may initially float towards the surface.
• Wear a mask and work in an airy place if the dry material produces dust.

FAQs

Why does perlite float after watering?

Perlite is extremely lightweight, so strong watering can move particles towards the surface. Water slowly and mix the perlite throughout the growing medium. A thin covering of potting mix can also reduce movement.

Why is the perlite in my pot turning green?

Green colouring usually develops when algae grow on a constantly moist surface exposed to light. It does not mean the perlite has spoiled. Allow the surface to dry appropriately and avoid unnecessary watering.

Can perlite burn plant roots?

Perlite itself does not burn roots because it is not a concentrated fertilizer. Root damage is more likely to result from excessive fertilizer, unsuitable pH, heat or watering problems in the surrounding mixture.

Can perlite be used as a surface covering?

It can be used on the surface, but its light particles may move during watering or blow away outdoors. Mixing it through the root area normally provides more useful drainage and aeration.

Does old perlite need to be replaced?

Perlite does not decompose quickly, but particles may become crushed or blocked by fine soil over time. Replace or refresh the mixture when it becomes compacted, drains poorly or contains diseased roots.