The clay sprouter is very good for growing small amounts of wheatgrass hydroponically, but for larger amounts I recommend growing wheatgrass in soil.
1. First soak the dry wheatgrass seed for 12 hours or overnight and then sprout in a jar or bowl for a day or two until they make a tail. If I'm are using all three trays of the sprouter then I use approximately a cup of dry seed.
2. It's important to soak the clay trays in water for a few minutes so that they can absorb the water. This will help keep the spouting seeds damp and should prevent them from drying out. Soaking the clay is especially important when the weather is hot. If you spread the germinated seeds straight onto a dry tray then the clay will suck the moisture out of the seeds.
3. Spread the sprouted wheat evenly out onto the tray or trays. Remove any chipped or damaged seed that hasn't sprouted and may have white of blue mold on it (yuck). With good quality seed this should rarely occur.
4. Stack the tray or trays you are using with the lid on top and the water catcher on the bottom. Water with a cup of water twice a day making sure the water runs right through to the base. Empty the base if it gets too full. The wheat grass will continue to sprout and grow.
Keep the sprouter in a warm roon out of direct sunlight.
5. After a day or two (The grass grows at different rates depending on how warm it is) the wheat grass will have filled the container and it's time to remove the lid. You will find that there are small white roots growing through the drainage holes. At this stage you no longer need to water the wheatgrass from the top and can simply keep the base of the sprouter filled with water.
If you are using more than one tier then now is the time to separate them and place the extra ones into a seperate tray of water.
6. Keep an eye on the water level, especially in the terracotta base as it's important not to let it totally dry out.
7. Harvest your wheatgrass as soon as it starts to branch. Cut (mow?) with clean scissors a couple of cms (1/2 an inch) above the seeds. Either juice your wheatgrass straight away, or store in an airtight container in the fridge for up to a week.
The Sprout Master Triple Sprouter (amazon.com) is used by many to grow wheatgrass hydroponically (no dirt!). An alternative to a clay sprouter the Sprout Master Triple Sprouter is
a plastic sprouter that can be used to successfully grow wheatgrass. It's on my wish list!
The following quote is from an independant Sprout Master amazon.com review:
"Here's is something that will simplify your wheatgrass growing IMMENSELY! Begin by soaking about a half-cup of wheat berries (hard winter wheat is usually recommended) twelve hours (more or less) and allowing them to sprout for three days or so. When you are ready to spread these little sprouts out into your sprouter, first fit one sheet of natural, untreated paper towel in the bottom of the sprouter (you can find these untreated paper towels at almost any healthfood store)...."