DENVER (AP) — Colorado appears to be giving up on its effort to crack down on medical marijuana growers who are using a legal loophole to grow high numbers of pot plants without the kind of oversight faced by commercial growers.

The Colorado Department of Health and Environment said in a statement Monday that it was reviewing responses to letters it sent earlier this month to about 2,300 doctors who have recommended medical marijuana. The letters sought medical justification for recommending more than six plants to any patient.