Vermiculite in Horticulture

Vermiculite is well established as a growing medium.

It is most commonly used in compost formulations, usually in combination with peat/soil. Vermiculite /peat compost formulations provide an ideal condition for plant growth. The presence of vermiculite particles in the compost aids aeration, improves moisture retention and promotes the steady release of added fertilizers while vermiculite itself contributes potassium, magnesium and a number minor elements.

The air / water ratios for vermiculite and peat compost are ideal for the stimulation of root growth and production of healthy young plants. Vermiculite is sterile when processed. Vermiculite is also used as a carrier and extender for fertilizer, pesticides and herbicides. It is also used in a ground form for encapsulating seeds.

 Advantages using vermiculite:

  • Encourage better aeration
  • Promotes good drainage
  • Prevents excessive temperature fluctuation damaging the seedling/cuttings
  • Buffers the nutrient supply in the mixture
  • Stimulate root growth giving quick anchorage of the plant


Other application

  • Blocking Mixes
  • Hydroponics
  • Potting Mixes
  • Micro Propagation
  • Seed germination
  • Sowing compost
  • Seed sowing in open ground