Gro-Sure Vermiculite

Gro-Sure Vermiculite

Gro-Sure Vermiculite is a naturally occuring mineral which has been heated to high temperatures to produce lightweight, absorbant flakes, perfect for a range of gardening tasks.

  • Naturally occuring lightweight material
  • Helps retain moisture & nutrients
  • Provides insulation for healthy seed germination
  • Size 10L


Why use Gro-Sure Vermiculite?

Gro-Sure Vermiculite encourages strong, healthy seedling growth and establishment. The fine grade flakes can be used on their own or added to Gro-Sure Seed & Cutting Compost to:

• Help compost hold onto vital plant nutrients

• Increase compost water retaining capacity

• Insulate seeds against damaging temperatures and humidity changes (when used as a seed covering)

Handy gardening tips

• Store in a dry, frost-free place away from weedkillers and other garden chemicals

• Wear gloves when handling and wash hands after use

• Reseal bag after use

Directions for use

Seed sowing

When sowing seeds always following the directions on the seed packet. 

Seeds of all sizes can be raised in just Gro-Sure Vermiculite. 

Image of a pair of hands above a seed tray, one hand is used to hold seeds, the other to plant them into the soil.

Alternatively seeds can be raised in a 50:50 mix of Gro-Sure Seed & Cutting Compost and Gro-Sure Vermiculite. This is particularly beneficial for very small seeds. Sow seeds thinly and evenly, making sure they are not too deep in the compost. Cover seed trays with a thin layer of Gro-Sure Vermiculite and gently moisten. Avoid over-firming.

Pricking out

When seedlings are large enough to handle, remove from seed trays with a dibber or pencil. 

Image of a pair of hands removing seedlings from a seed tray using a dibber.

Plant into Gro-Sure Seed & Cutting Compost or a mixture of this compost with 25% to 30% of Gro-Sure Vermiculite. Space seedlings well apart to allow for strong growth. Water regularly to avoid compost from drying out until seedlings are ready to be potted on.

Potting on

Use a mix of Gro-Sure All Purpose Compost with 25% to 30% Gro-Sure Vermiculite. This creates a light and very open structure enabling compost to absorb and retain moisture for easier re-wetting. 

Image of a pair of hands re-potting a plant.

Before transplanting plants from pots to containers it is recommended to water the plant well and allow to drain. Remove plants from their pots and place into the container, firming compost around the plant roots. Once the container is fully planted, water well and feed as appropriate. 

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