BonsaiBoost, Organic Bonsai Fertilizer


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For over a century, Japanese bonsai artists have used an organic fertilizer to provide the nutrients needed to keep their trees in perfect health year round. BonsaiBoost is locally produced from high quality, pure canola meal, the same ingredient still used in Japan today. BonsaiBoost should be used on any bonsai or potted plant, from collected stock through to exhibition trees and on flowering, fruiting or evergreen trees. Easy to use with no mixing required, BonsaiBoost sachets are laid on the surface around the bonsai and watered as normal. At each watering, a little of the nutrients in the sachet is carried to the roots. Sachets can be replaced every 2 months during the growing season.


  1. Time saver - every time you water you are fertilizing at the same time.
  2. Organic fertilizer which cannot burn your trees.
  3. Sustained, slow release of nutrients to your trees.
  4. Promotes healthy, strong growth.
  5. Easy to use and will not harm pets if accidentally ingested.

The above claims are guaranteed. If you are not 100% satisfied we will refund you in full.

Easy to use

BonsaiBoost is packaged in high quality coffee filter bags to ensure water penetrates easily but without allowing the ground fertilizer to disappear into the soil mix.

To use simply place the BonsaiBoost bag onto the soil and secure in place with wire or a toothpick. For shohin (small trees below 30cm) you should use about 1 bag. Medium sized trees can take 2 bags and larger trees as required. For maintenance of developed trees you will not need as much fertilizer as trees which are still being developed.

Replace the bags roughly every 2 months. When you first start using them they will omit an odour. This odour diminishes with time till eventually no smell is experienced. The ground canola cake will become a solid lump, this is normal.

While using BonsaiBoost little additional fertilizer is needed. For many years, Japanese bonsai professionals have been using exclusively these cakes to fertilize their trees. However for flowering plants you may want to use a fertilizer specifically aimed at promoting flowering. A seaweed extract may also be a good idea to use once in a while.

BonsaiBoost is the ideal fertilizer when using open growing mediums such as our Professional Bonsai Growing Medium.

100% Biodegradable

After using the bag for your preferred length of time don't simply throw it away. You can do the following:

  1. Make a small hole in your garden soil and bury the bag, it will completely degrade and add to the nutrients there too.
  2. Use it around your overpotted trees which are still undergoing development.
  3. Fertilize your field growing trees.
  4. Place into pot plant containers.

How many trees can I feed?

  • 20 Shohin trees for 2 months
  • 10 Medium trees for 2 months
  • 7 or 8 Large bonsai trees for 2 months


Macro elements:

  • 53 N g/kg
  • 12 P g/kg
  • 14 K g/kg

Micro elements:

  • 7.9 Ca g/kg
  • 0.62 Mg mg/kg
  • 62 Mn mg/kg
  • 195 Fe mg/kg
  • 5 Cu mg/kg
  • 58 Zn mg/kg
  • 40 B mg/kg

If you would like to add a slow release organic fertilizer to your growing mix when you repot, then you may wish to consider our Milled Seaweed. Read more.

You can also find BonsaiBoost at these leading nurseries:


  • Benbel Garden
  • Cape Garden Centre
  • Earthworx Garden World
  • Improcare Hardware
  • Kaap Agri Agrimarkte
  • Kirstenbosch Garden Centre
  • Stark Ayres Rosebank
  • Stodels Bellville
  • Stodels Constantia
  • Stodels Kenilworth
  • Stodels Milnerton
  • Stodels Somerset West
  • Super Plants


  • Birch Acres Nursery
  • Colour Country Nursery
  • Keen Gro
  • Lifestyle Garden Centre
  • Newtown Fertilizers
  • Obaro
  • Plant Ranch Centurion
  • Plantland


  • Clarks Tuinsentrum


  • Parys Kwekery


  • Montana Garden Pavilion
  • Garden Terrace
  • Imbali Garden & Pet Centre
  • Obaro
  • Plasgrow
  • Secunda Kwekery


  • Springbok Tuinsentrum


  • Grovida Horticultural Products


  • Green Fingers


  • Obaro

Category: Fertilizer

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