Have you looked at this post? http://community.rachio.com/t/drip-emitter-calculator-for-precipitation-rate-area/6155 That should help you determine what to enter as nozzles.
If you are watering vegetables, it won’t matter if you enter in perennials or annuals — you are going to need to go in and put in a custom root depth as well. And you will need to up the Crop Coefficient.
@sunny, could you help out here? I know you’ve done quite a bit with vegetables.