Once an indoor worm bin has been up and running for six or more months, you’ve built up enough vermicast to do some harvesting. http://www.naturesperfectplantfood.com/2011/09/13/wom-bin-mainenance/ Separating worms from castings is not a difficult task but it can be quite time-consuming. Make sure you have a work space that can be used for at least a day. There are two main methods for harvesting vermicast, the bribery plan or the hostile environment method. http://www.naturesperfectplantfood.com/2011/12/16/bribing-worms-for-harvest/ Regardless of how you acquire it, what to do with the vermicast once it’s ready is another question entirely. If you have house plants you can use it in different ways. As a soil conditioner/fertilizer it works wonders straight out of the bin. For those more adventurous you can make worm tea, the simplest way is to soak 1 part casting to 9 parts water for 10-12 hours. With out air any longer than this can turn anaerobic, though that won’t hurt your plants, it may get smelly. Some people incorporate air into the tea through an aquarium bubblers, this way the beneficial aerobic micro-organism can multiply. Either way your plants will get a huge fertilizer boost and the soil will be strengthened by microbial action.