The quail biologists in the South recommend strongly against the Lark cultivar of partridge pea due to its aggressiveness. Not sure if that’s the variety you’re talking about.One thing you can do to really help quail is to plant an improved and aggressive variety of partridge pea like they sell at Roundstone. It keeps finding a way to come back year after year - even when perennials start to take over the ground. It can also be easily brought back by light disking if it ever needs it.
I think most biologist who have experience with it would tell you that it is almost the perfect plant for quail because of:
1. Abundant tiny seed which quail relish as food.
2. Good cover - 5 or 6 feet tall for the improved varieties.
3. Excellent survivability for an annual plant.
4. A forb that doesn't get choked out in NWSGs as easily as some.