Sativa. Blockberry has a unique structure and is one of the sturdiest plants you can grow. It produces dense, olive-green buds with purple hues and a thick layer of frosty trichomes. Blockberry is 28% THC, making this strain an ideal choice for experienced cannabis consumers. Customers tell us Blockberry effects include feeling euphoric, creative and focused. Patients often choose Blockberry when dealing with symptoms associated with gastrointestinal disorders, depression, and fibromyalgia. Blockberry features flavors like orange, vanilla and blue cheese. The dominant terpene of this strain is myrcene, which gives it an earthy and cherry aroma.