How can you prevent wild iguanas from eating the portulaca in your yard?

Ive had this problem twice in recent years and have found two very different but equally effective methods of solving this frustrating problem. The first time i waited near the portulaca with my shotgun, and thus shot any iguanas that came near. you have to make sure to leave the dead iguanas to rot so as to warn other iguanas of the treatment they will get if they attempt to eat your portulaca. This proved highly effective, although did attract predatory animals and create a pungent aroma to the yard. This prompted me to use my second effective method when the iguanas eventualy returned. I set fire to my portulaca, making sure every bit was destroyed. This worked amazingly, and i now never have to worry about the iguanas eating my portulaca... I hope this helps and you manage to stop the iguanas eating your portulaca, i know how frustrating it can be!