Scroll through these - there are lot of great ones! I hope one is what you are looking for!
What are your quintessential summer flowers that are your favorites? Hydrangeas? Sunflowers?, Daisies? Choose your favorite and purchase that flower from a craft store ( on sale and grab an extra % off coupon as well) also grab a wreath form. Smaller ones can be had at the dollar store. ( while your there see if they have decent floral picks.) and just tie the flowers to the frames. I use pipe cleaners. You can also add plastic fruit, and faux insects like butterflies, bees that you can hot glue into your design. I love wildflower sprays and grasses, weaved in the grapevine forms.
Carla: maybe these will help
Carla, summer wreaths can be made from many objects including horse shoes, barbed wire, branches, pine cones, sashes, or even dollar store flowers. These go from easy to easier. By changing colors or types of silk flowers these can be adapted to any season. I hope this helps!
Here's one I made for $4, just a little fun thing.