Oyster Shell Lime

Oyster Lime is a premium soil amendment that is derived from 100% locally farmed and sourced oyster shells. It is a slow-release source of calcium and magnesium, and it also contains chitin, which has immune-modulating properties. Oyster Lime is a great way to improve the structure and drainage of your soil, and it can also help to boost the populations of beneficial microbes in your soil.

HPO Oyster Lime isn’t just simply crushed shells, it’s a process that has taken us a decade to develop and refine.

most Oyster Shell powder you’ll find hasn’t had anything done to mitigate the Sodium portion which is present in any sea-based ingredient. This limits its utility as a soil ingredient as you are adding Calcium but with Sodium as well, plants unfortunately uptake with Sodium with greater ease than Calcium, causing lacklustre results.

We identified this issue many years ago, but seeing how good Oyster Shell Powder can work in soils, we have persisted and found a way to maximise this amendments benefits, while mitigating its drawbacks.

Through a combination of custom process which starts with desalinating, cleaning and pasteurising the shells, they are then fully dried and processed to powder and granule through multiple grinding and sieving stations, yielding a uniform, clean and garden worthy end product.

Benefits of using Oyster Lime:

• Improves soil structure and drainage
• Provides a slow-release source of calcium and magnesium
• Boosts the populations of beneficial microbes in the soil
• Helps to prevent calcium and magnesium deficiencies
• Improves the overall health and productivity of plants

How to use Oyster Lime:

Oyster Lime can be applied to the soil either by top dressing or mixed in as a buffering ingredient for base materials like Peatmoss. An application of about 500mls per 50L of unbuffered Peatmoss is a good place to start for most plants.

This ingredient pairs well with Wollastonite and Gypsum.

Note: Soils that are fresh and comprised predominantly of peatmoss, or other acidic bases, should utilize the higher application rates. Soils that have been already amended and are being recharged will do better with the lower rates of application.

Order your Oyster Lime today and see the difference it can make for your plants!