stretch,

Ask the pump guy what your well's sustainable yield is? aloha

Wouldn't the well gpm depend on what size pump is hooked up to well line.

Well driller said 25 gpm. I'm going to stick with 4 zones. My biggest is 12.7 gpm. What pump size would be good. My well is 65 ft, I would like a little mor gpm incase I want to add sprinklers in the future.

stretch,

Here is a good link to understand the process of selecting your pump:
http://www.wellpumpsandfilters.com/Sizing-Well-Pumps_ep_41.html

Info to find out:
1. For 12.7 gpm what is the well's drawdown?
2. Diameter of well casing
3. Type of pump you want to purchase?
4. Depth of water level in well to ground surface in feet?
5. Elevation difference in feet from well ground surface to highest point the water will be needed?
6. What pressure you will need in the irrigation system?
Aloha