6Harvest time

A well balanced worm farm produces worm wee, a super-rich liquid fertiliser-like rocket fuel for your garden and pot plants. Worm wee generally takes a few weeks to start flowing and will increase as you add more food. Worm farms also produce solid worm castings (worm poo) that you can harvest and use as a powerful nutrient additive for your soil.

Worm castings and worm wee provide an incredible amount of nutrients and are packed with beneficial microorganisms. This makes them the perfect zero emissions natural, organic fertiliser for your garden; creating healthy, fertile soil.


  • You can store worm wee in old glass jars or plastic containers. If you leave it in a dark, cool area, it will keep for a couple of months, although it’s always best to use it fresh.
  • Spraying diluted worm wee on the leaves of plants make the leaves healthier and stronger and protects them from pests.
  • You don't need to worry about emptying worm castings more than every six months or so. When you do, add some moist shredded newspaper in the new empty tray as bedding for the worms.
  • Worm castings should be used soon after harvest, before they dry out.

Did you know?

You can mix your worm castings with soil in a 1:1 ratio and spread it around plants. To make potting mix, combine the castings with either soil, compost, sand or vermiculite at a ratio of 1:4, and mix well.

Note that sandy soils don't have enough structure or biology to retain many nutrients. To add structure to sandy soil, first use a large amount of compost or mulch, then combine with worm wee and castings. By doing this you'll quickly start to build up rich, dark soil. 


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