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Please note this product has been retired from the range. However, you may still be able to purchase this item online or in store. Should you have any queries or issues with the product please do get in touch. Please see our NEW Peat Free Bonsai Potting Mix
Westland Bonsai Potting Mix is formulated for the correct balance of drainage and water retention as well as aeration. Which is all required to develop a healthy root system, and is essential for healthy bonsai growth. The mix also contains special water retaining granules from Seramis. These granules allow the plants absorb everything they require.
  • For strong roots & healthy trees
  • Specialist blend
  • Open structured compost for healthy root growth
  • Contains water-retaining Seramis

Sizes available

  • 4 litre
  • Product Details
  • How to Use
  • Tips & Advice

Why Use

  • Contains unique Seramis granules for optimum water and nutrient availability
  • Added wood fibre creates an open structure for improved aeration, drainage and water management

When to Use

  • Spring or Autumn

How to Use

  • Each spring take your bonsai tree out of its pot to inspect the roots to see if the plant needs potting on
  • Even if re-planting in the same spot, tease out the old compost and trim the roots before adding fresh Westland Bonsai Compost
  • Keep it out of the sun and water frequently to allow it to recover
  • Westland Bonsai Compost will supply your plant with all the nutrients it needs for the first 6-8 weeks

Growing and re-potting

  • Select a young tree or shrub and pot it up in Westland Bonsai Potting Mix using a small pot • For the next 2–3 years regularly trim the roots and shoots
  • When the bonsai tree is ready to be transferred to its permanent container, fill the container with Westland Bonsai Potting Mix and secure the tree in the pot with wire
  • Before planting, trim the roots so they fit into the container without having to be bent or forced
  • Keep the plant out of the sun and water frequently to allow it to recover
  • Each spring, take your bonsai out of its pot and inspect the roots to see if plant needs to be potted on
  • If replanting in the same pot, tease out the old compost and trim roots before adding fresh Westland Bonsai Potting Mix
  • Keep it out of the sun and water frequently to allow it to recover


  • Water once or even twice a day during summer, but less frequently in winter
  • Always ensure that excess water can drain freely to avoid root damage.


  • Westland Bonsai Potting Mix will supply your plants with all the nutrients they need for the first 6–8 weeks
  • During spring and early summer, feed your plant with Westland Bonsai Feed every two weeks

Tips for Better Results

  • Keep plants out of draughts and away from intense heat. Spraying with water at room temperature twice a week and sponging the leaves occasionally to remove dust is also recommended
  • Nip branches back when they begin to grow otherwise pruning cuts will show up in wood and will be noticeable.


General Advice

  • Store in a dry, frost free place away from weed killers and other garden chemicals
  • Reseal bag after use
  • Not suitable for ericaceous (lime hating) plants
  • Use in a well ventilated place and avoid breathing in dust
  • Always wear gloves when gardening and wash hands after use


Frequently Asked Questions

Q. Can I use this for outdoor plants?

A. Yes this can be used for other plants but , but we would recommend early feeding as Westland Bonsai Potting Mix has reduced nutrients to keep the plants compact

Q. Will this be attractive for my pets?

A. This will not be attractive to most pets as it does not contain any organic fertiliser elements

For any questions or advice, please contact our technical advice line on 01480 443789 (Mon-Fri 10am-4pm) or email customerservice@westlandhorticulture.com



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