Hi Jack...
I really like short lines (something I need to work on!) and this is really effective.
I think this might be an opportunity, in addition to presenting the Summer memories, to really take us there with some senses-related images e.g. You get the smell of the fields, but maybe we could have the sounds of the fair, the zing or the stickiness of the ice cream etc.? Just a suggestion as those sorts of details can be very relatable.
That said, you have a good song here already. I'd have another look at "fun trips out" - I'm sure there's something more interesting to say there. And I'm not sure if you meant to say "dance sway" - one or the other is probably better. Finally, a bit in line with what Darren says, I can't really picture myself singing the word "foliage" ... maybe give it a try and see if something else comes to mind - an idea like a chiffon or a sarong (?) that a lady might wear on Summer days could be cool...
Not being critical at all, just looking to see how this could be made even more memorable and singable, and just one (quirky) person's opinion so feel free to ignore as always!