Can you please suggest a recipe(s)/directions for preparation of liquid
fish fertiliser for the organic home garden/orchard. We live by the sea
and have plenty of fish waste. We need some guidance on how/how
much/how long etc. Also, any suggestions for seaweed preparations?
Geoff and Reihana
Here are some general directions for using fish or fish scraps as fertiliser:
Put the fish material in water (just enough to cover them) and mix in some leaves, sawdust, or other high-carbon material which helps to minimise the smell of fermenting fish.
Cover the mixture and leave it outside for a week or more. This gives time for the leaves etc to break down, and for anaerobic bacteria, which in fertiliser will help fend off pests and disease, to develop.
When it is ready to use, strain the liquid through cloth or a sieve and dilute with water until it is approximately the colour of weak tea. It can then be used in the manner of liquid fertilisers.
Additionally, you could add a small amount of natural soap as a wetting agent - so it sticks to the foliage or soil better.
Seaweed as fertiliser - it may take a long time for it to compost in water, so boiling is recommended. Cook the seaweed until the water is green, and it can be stored in a closed container or used when it has cooled. Also, some people use powdered kelp as an ingredient of home-made fertiliser, so perhaps drying and powdering it would be useful.
Always start with a very diluted solution and possibly only on a few plants for testing. These liquid fertilisers can become very strong and may burn your plants!