According to Wikipedia, the Soviets banned unauthorized cannabis growth in 1934, although hashish continued to be used in places where it had existed previously, most notably Kazakhstan. Hemp was a major industrial product, however.
Bukharin is where that timeline gets tricky. He was cast out in 1929 and arrested in 1937. This anecdote would have probably been in the 20s when he was on good terms with Stalin.
According to Wikipedia, the Soviets banned unauthorized cannabis growth in 1934, although hashish continued to be used in places where it had existed previously, most notably Kazakhstan. Hemp was a major industrial product, however.
Bukharin is where that timeline gets tricky. He was cast out in 1929 and arrested in 1937. This anecdote would have probably been in the 20s when he was on good terms with Stalin.