Summer Glade is where the sun shines its brightest. It's a hotspot for Fairies who want to relax and play, whether in the golden Sunflower Meadow, where Iridessa lives, or the grassy Needlepoint Meadow. The Minister of Summer lives[1] and rules Summer Glade with supreme authority, and only Queen Clarion is the highest order (even than her friend minister herself), there.
This place is the ideal spot in the entire hollow to craft and design rainbows, either for decorative purposes or to be stored up inside Rainbow Tubes by Light Fairies. They are their rightful owners (despite them actually being handcrafted by Tinker Fairies).