Here are a few questions that someone (from outside the US) asked by email and answers from Rich, head grower here at Gourmet Greens:
How long before you plant your wheatgrass do you water your seeds?"We soak the seed for 12 - 24 hours (under refrigeraton in the summer time), then we drain the seed and plant either immediately or wait up to 24 hours before putting seed onto the trays of soil."
How much water do you use per tray?
"When planting, we do not water the trays as there is enough moisture in the soil. After the trays are separated to the shelves (2 - 3 days later), the trays are then watered immediately and every 24 hours until maturity which is usually six to eight days (depending on time of year and growing room air temperature.)"
How do you soak so much seed?
"We use 5 gallon buckets to soak the seed. Seed is measured and adjusted as necessary with one pound coffee cans. Coffee invades even wheatgrass growing. At the end of the soak time the seed is drained using five gallon buckets with many drilled holes. "
Do you use sprouting bags?
"No. Never have for commercial growing."