We cherish every seed, so it is very unlikely that our trees will propagate off of our farms. Animals wont eat the fruit, so they won’t carry the seeds elsewhere. We also weed constantly, so rouge trees would be quickly dug up. It takes almost a year before jatropha trees start bearing fruit, so they will be fairly slow to spread.

I could see grasses and reeds getting out of hand quickly. Much of the US is covered with European grasses and other invasive species. I love how we Americans are always giving out great advise on biodiversity and preservation of natural resources when our own country has been devastated. The USA bears little resemblance to the country that was here before European settlement.