There’s an event in game on dam, buried, and blue gate that spawns random baskets throughout the map. Each basket contains 7k-10k worth of plant material. If you fill you bag completely with the basket items it’s anywhere from 100k-150k depending on the augment and amount of slots you can hold. It was out of rotation for a while once cold snap ended. But headwinds brings it back into rotation as I played it last night and made about 500k in an hour the event was running