I want to upgrade my chook (New Zealand slang for chicken)

And to do so, I need some lemons. I was told that Marano Park in the Buried City was the place to solve all my problems. However, all I find is a bastion and plenty of apricots and my chook's already gobbled up enough of those. I ran into some Norwegian friendlies nearby who told me that they found lemons in the Space Port but that seems rather odd considering how parched the area looks whenever I explore it. Any tips?