When visiting her in Vault 81, Dr. Penske asks the Sole Survivor to eat a fresh mutfruit from her farming to help her investigation. After eating it and talking to her again, she offers to buy bags of fertilizer from the player character for 25 caps each.
PC Playstation 4 Xbox One When trying to sell fertilizer to Dr. Penske, she may just give generic dialogue instead. [verified]
- Reverse-pickpocketing one bag of fertilizer onto Dr. Penske will resolve this, since the code erroneously checks her inventory to trigger the dialogue, not the player character's. Alternatively, the console command 2a826.additem 5a0d9 can be used to add a bag directly to her inventory without risk of being caught pickpocketing.