DIY Knit Cacti Patterns from Ravelry here. Ravelry is free to join with so many free patterns, but this is a pay pattern. I posted some free knit cacti patterns here, and for cactus DIYs (cactus cupcakes, etc) go here. First seen at One Sheepish Girl here
This decoration for knitted projects looks like Latvian Knitting, but is really just crocheted slip stitches made into a knitted foundation. It's really easy to do and is a very effective way to add design interest to your knitting.