***Bugs can be a problem when mulch is too close to the house. Adding rocks can help that problem and also keeps heavy rain from splashing muddy mulch all over the siding. Great idea for front flower bed where the rain pours down.
Use extra edging (in this case gray concrete curb with a slant) and alternate between rock and mulch to add definition and create a fun, artistic design along your backyard fence. I would need rubber mulch to keep cats out