The fruiting plants are much better served with worm castings as it provides a rich fertile soil in which they will thrive. Read more about the benefits of microbes in the soil here and here. Microorganisms in your garden soil will increase your yield of fruit and vegetables. The simplest way to increase the level of microbes is to add worm castings to your garden.
I have already written about setting up a worm farm using an old bathtub, now I'll talk about harvesting the castings and maintaining the worm farm.
From day one of your worm farm, when the catching bucket under the worm farm is full, you should pour that back into the farm. After about a week or so, you can start using the worm juice as fertiliser. The longer the worm farm goes for, the better the juice will be - beneficial bacteria and various microbes will built up in the juice and castings and will boost your crops when you apply it to the garden.
But let's get back to maintenance. Over the months you can scrape off castings from the top of the farm and use them on your plants. However, there will come a time, depending on how many worms you start off with, when it will be worth your while to rebuild the worm farm and harvest all the castings. In the photo below there are thousands of worms lurking. So how do I get them out of the castings so I can use it on the garden and keep the worms working in the farm? There are a few ways to do this, this is what I do.
Then I covered the new section with an old wet bathmat. The worms will eventually eat that too. I wanted to create a tasty attractive environment so that the worms would travel from the castings over to the new side.
I did this one week ago and when I checked yesterday the worms had already moved into the new food. I'll give it another week and then take all the castings out and use them on the garden. There's about 30 kgs of castings there - a huge boost for our vegetables and fruit. When that side is empty, I simply repeat the layering exercise, and the worms will eventually eat their way back to that side too.
If you've been thinking about starting a worm farm, jump right in. Even if you're in an apartment and want to do some composting, a small worm farm will use up all your kitchen scraps and give you great castings for your indoor plants. And don't worry about constant care. If you've given your worms a good feed and they're in moist conditions you can easily leave them for a week without feeding.