Tokyo Wide 3 day pass

Hello,

I’ll be passing through tokyo for about 4-5 days at the end of april. I’m trying to decide if i should get a JR pass? The tokyo wide 3 day pass specifically. Is this worth it? I dont have much in my itinerary at the moment but since it’s my first time in Japan during april, i was thinking of maybe going to see the flower parks? Would i be able to go to the Ashikaga Flower park with this pass?

Thank you!