Originally Posted by glass frog
Their are reports of them having a decent number of them in south jersey.
Actually this doesn't excuse further releases of the frog... particularly since you could be transporting pathogens parasites and diseases to unexposed regions. If you can't contain them (which is evident through the statement about open doors and windows), you should absolutely not put them in the greenhouse.
It is also illegal to set them up in a situation where they could escape since they are not from the region (see the standards prohibiting release of animals exposed to exotic diseases or parasites (which frogs from outside of NJ are automatically considered to have been exposured to particularly since they were kept as pets...). See http://www.nj.gov/dep/fgw/pdf/relocation_policy.pdf