Not to divert the conversation on rubber mulch but:
I have found pine bark nuggets (not the small stuff) looks natural and in the past year has needed very little refreshing
The nuggets won't blow away like the lighter organic mulch's and I'm comfortable with using mother natures own product. Even if I do have to refresh ($4.00 per bag) I at least know it was degraded back into the soil. Adding a plant to the flower bed merely requires me to move aside the nuggets, dig the hole, plant the plant and place the nuggets back where they were
Just a thought :

Handie :joke:
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Upstate NY and The Villages-If your not living on the edge, your taking up way too much room."