After thinking it through and working with what I could find, I opted to do the mat itself in a half double crochet. It makes it ridgey and kind of open. Since our soil and I use the word soil loosely is mostly sand when you wipe your feet I'm guessing the sand will go right through, I can shake out the mat and sweep the concrete and keeping the porch looking nice won't be too hard. I used Faith's pattern for the edging and for the flowers. Mine is pictured below, I need to add two more flowers and really secure the ones I already have on there. This picture was taken when I was doing a test run to see how it was going to lay, feel on bare feet and I give it two thumbs up. Let's pretend I've already blocked it ok?
Here's the view coming up from the sidewalk. Not too shabby. I love this mat. I loved it from the first time I saw it. It had me at hello, ok? (yes I know there's one grey pot mixed in with the terracottaesque ones, whoops!)
The people at Ace Hardware kept asking me what or who I was tying down, hahaha, they thought they were so funny. Then when I told them I was crocheting a mat for my front door they all stepped back from me a few feet. People just don't "get" it do they? After my third trip for more twine(I used 7 balls of the green) the cashier lady asked me if I would bring it in and show it to her when I got it finished. I told I'd bring it in one day next week.