hello boo,
all depends mate, some plants give ya less than a 1/4 some can give over 6 to 8 ounces, it also depends how well its been grown, but if you grow indoors under good lighting, i would expect around half an ounce per plant on average when dried, if you grow out doors with good sunshine and good dirt and good plant then upwords of 3 ounces per plant is easily achievable, but you must concider that so much reflects apon the final yield, a simple mistake can result in no yeild, all the best