In Portugal, personal consumption limit is 2.5 gram per day of marijuana. One may possess not more than 10 daily doses, otherwise it may be categorized as trafficking. Consumption still has a penalty that may be a fine or other penalty. Cultivation, even if for personal use, is still totally illegal and cultivation of even one plant is assumed to indicate involvement with trafficking. Possession of seeds is also illegal and despite there being several "head shops" or "grow shops" in Portugal, they are not allowed to sell seeds.
http://en.wikipedia.org/wiki/Legality_of_cannabis