around southern ontario, hydroponic leaf lettuce is close to $3.00 a head... a head will mature in 3 weeks from transplant from starter trays... that means 21 h

around southern ontario, hydroponic leaf lettuce is close to $3.00 a head... a head will mature in 3 weeks from transplant from starter trays... that means 21 heads of lettuce in some state of growth between leafling and finished product if you do a continuous production culture... 8 inches is adequate linear spacing for fancy leaf lettuce thus 168 linear inches per batch repetition thats 14 feet or 2 units of 7 feet... almost everyone has the spatial capacity to produce thier own continuous supply of leaf lettuce at home, if they dont mind tending them as they would a common house plant... Oh BTW ...how much does one pay for a nice ceaser salad nowadays?