Cannabis cultivation guidelines were released in Greece after medical marijuana was legalized in 2017. The guidelines allow: 1) Import of cannabis seeds and cultivation of non-EU varieties with approval; 2) Indoor cultivation in greenhouses using hydroponic systems or pots; 3) Pre-germination of seeds and separating male and female plants before field planting. Producers must keep sales records for three years. An estimated 2 billion euros could be generated under the new guidelines.