We get many enquiries regarding tray system wormeries, stacking system wormeries they are all pretty much the same, some may have 2, 3 or even 4 working trays, what is obvious is that the instructions leave many people understandably confused! Please read this in conjunction with the information found here: https://www.wormsdirectuk.co.uk/blog/category/composting-and-worm-composting/ We know it is a lot to read but it could save a lot of disappointment!
The main components of a stacking wormery are the sump tray with a drainage tap and to which the legs are attached, then you have 2 or 3 “working” trays, these can be identified by having holes drilled across the base and a lid. Once the tap and legs have been assembled, a working tray is next put in place, a couple of sheets of newspaper or similer should be cut to cover the holes and this is simply to stop the bedding dropping through into the sump area, when the paper is in place you will add the bedding (or worm and bedding kit if supplied) you may have received just worms with no bedding and it is expected you supply this, you may have received just worms and a coir block.
If you have recieved just the worms you will need to provide a bedding mix, see here for recommendations. https://www.wormsdirectuk.co.uk/blog/category/composting-and-worm-composting/
If you have received a coir block (not recommended by Worms Direct) follow the instructions, if you have received or purchased a “worm and bedding kit” https://www.wormsdirectuk.co.uk/product/worm-and-bedding-kits/ instructions will have been supplied. In all cases the worms will need a good depth of bedding, this will average 10 litres in most stacking tray systems, the depth needs to be a minimum of 4″ (10cm) preferably 5″ or 6″ (13cm or 15cm) this plus the worms will probably almost fill the tray – not to worry! if you do not achieve this depth with the bedding or coir supplied it can be bulked out with damp shredded paper, a note on the quantity of worms, different suppliers will recommend/supply different quantities in our opinion the minimum required is 250g , around 300 worms, anything less will be a struggle to establish.
The tray, which is probably almost full with worms and bedding should now have its first feed, using any recommended kitchen wast place a mug full in the centre and spread out a bit, the whole surface of the tray needs to be covered, you can use newspaper, cardboard or a piece of plastic cut to fit, even the so called “moisture mat” that may have been supplied! pop the lid on and leave it alone, no other trays are used at this point.
When the first tray is full to the top you add the next tray making sure the bottom of the tray is in contact with the surface of the 1st tray so the worms can migrate upwards, you continue feeding this second tray SLOWLY until this full, then you add the 3rd and final tray, at this point you should be able to remove and empty the first tray.
Problems that may occur or are caused: https://www.wormsdirectuk.co.uk/blog/category/composting-and-worm-composting/page/2/