UPDATE: 4/11/14, 10:15 a.m. EDT. The SEC has halted trading in GrowLife shares due to concerns about “potentially manipulative transactions” involving its stock. GrowLife has responded to the decision with a statement.

GrowLife, a public company whose products are used in the cultivation of marijuana, has hired Crowell & Moring to advise it on regulatory compliance and M&A matters amid a surge in public support for legalizing what has long been an illicit substance.