The quality of your strains depends on how well they are maintained. When you first plant a bud, a timer will start. It cannot be stopped. Your plant's happiness meter will appear below it. Water the plant at every chance. When the timer ends, your plant will produce a certain number of buds that is dependent on its happiness. Always try to water your plants to full happiness. You can hire workers as you progress, however early on you will have to watch and water your plants yourself.