There was a medical marijuana store that opened in AMS.
However, I believe it was very short lived.
https://www.smokersguide.com/news/81/europe_s_1st_medical_marijuana_cbd_shop___the_cbd.html#.Vsgys_DfWrXThe answers I've seen to this question on other sites suggest that your best bet is to look at Neplese or Indian hashs as these are alleged to have high CBD counts. ~20%
Siberia has a strain called CBD compassion which they say is 5.3% THC & 5.2% CBD.