I thought of a Christmas guide but I was never that hardworking to do a Seasonal Decor guide!
Very cool! (I love the Christmas tree’s lights, I forgot to add that to mine)
I feel like the apple orchard looks a bit plain for some reason… maybe add dried bushes and a rake to make it look more real (you know what I mean).
The pool is pretty cool but fairly simple. Rocks on the side and coral will be cool (even though it’s a pool, it looks a little plain don’t you think?)
I honestly just LOVE 
the flower cart. I’ll definitely use that, its creative and looks amazing!
I understand this is a work in progress, 
if only we could turn this into a wiki somehow…
I’ll give you some ideas for other things you could make:
Winter
you could just link my Christmas guide (Christmas Themed Ideas) The guide has a bunch of things you could make to make your map Christmas themed. Like you mentioned, adding Hanukkah stuff would be good.
Spring
Easter is in spring, correct? I don’t celebrate it but add bunnies and beautifully decorated eggs, very vibrant. St. Patrick’s day is in the spring too… uh… four-leaf clover? OH, rainbows and a pot of gold!
Summer
Beachball, floaties, sand, fishes, picnics, canoes/kayaks, popsicles, watermelon, umbrella, crab, ice cream, pineapple, coconuts, dolphins, clams, seagulls, and starfish are suitable ideas! (Yes, I know I kinda went overboard with the ideas)
Fall
Autumn trees, those beautiful multi-colored leaves always draw us in. Thanksgiving foods are great ones to add.