You cannot compare cannabis to tomatoes. They are different species, one fruits and one flowers. It take A LOT more energy to produce large watery fruits than it does to produce flowers. There are even many strains of cannabis that automatically drop all thier sun leaves 3-4 weeks into flower. Guess what happens, the buds still grow and pack on most of thier mass, weight, and density in the last 2-3 weeks of flower. This is proof that the large sun leaves are not needed anymore. Once this far along the bud/sugar leaves collect light and produce energy for the flowers. Bud you also need a very strong healthy plant/s with a large healthy root system and a full nutrient program since most are being grown in artificial conditions. This is where the advanced products come into play that many people think are a waste of money. Huge misconception. Also cannibis is one plant that actually grows healthier and produces better in artifical conditions. Its almost like cannabis was meant for growing indoors but its actually because the equipment used is designed to give plants exactly what they need without all the harshness of outdoor environments. This is also why there are many strains that produce larger yields and more potency indoors than out. There are strains that produce 150-300g outdoors but 550-600g indoors! Anyway, once cannabis is 3-4 weeks into flower the large sun leaves arent need IF plants are healthy, conditions are met, and feeding programs provide all the elements plants use in nature. Another thing to concider is, if you are getting sufficent light penetration all the way through your plants and your not getting any discolored leaves down low there is no reason to remove the leaves to begin with. Once leaves go pale green they are producing nothing to the plant and should be removed before yellowing and falling off to keep bugs and disease down. One thn