Finally got my girlfriend to stop bringing bug infested plants into the greenhouse from the nursery. Nursery plants always seem to have problems, and are happy to sell ya them to!!
Gave my plants neem oil in there water this season, teaspoon per gallon at seedling stage, then tablespoon per gallon every 3, 4 weeks. Stopped once they started flowering. Aphid infestation on the tomatoes, literally 1 foot away from them, the pot had almost zero aphids.