Another easy way to do a repeat with a hand drawn picture is the mirror repeat. All you need to do is copy and paste your picture, flip it vertical and join it up to the first part. Then copy and paste the joined two and flip them horizontally. Spoonflower already has this option in their software. Sometimes it ends up looking odd. This has been my experience when I've mirror-repeated designs with characters in them. But sometimes,as is the case with ol' Minty Leafy again, it comes out fractally divine. :)
Here is another sketchbook peek. I still miss my old sketchbook, which reached its last page about 2 months ago. I really need to find another one like it.