The musician, real name Courtney Freckleton, used the encrypted messaging platform EncroChat to contact an unknown exporter called “MicroBird” to organize large-scale shipments of the drug.
Boilers were used to smuggle some of the cannabis from Poland, Harrow Crown Court said.
Nine, who topped the UK album charts last year with his third studio release Crabs In A Bucket, appeared in North West London court with Jason Thompson, 35, where they both admitted to conspiring to import cannabis into the UK from Poland and Spain.
They also pleaded guilty to conspiring to transfer criminal cash between March 10 and July 3 of last year.
The couple managed to import cannabis, but a second attempt was unsuccessful, the court was told.
Prosecutor Genevieve Reed said the money laundering charge was linked to a debt of £ 98,000 – the value of cannabis – and the use of Bitcoin to buy it.
The pair were arrested in June in connection with police raids in London and Borehamwood, Hertfordshire, following the infiltration of EncroChat last year, which was used by organized criminal networks in the whole world.
The network was based in France before being shut down after being hacked by investigators.
When Judge Rosa Dean sentenced the two Nines, of Barbican, central London, and Thompson, of Barnet, north London, to 28 months in prison, she said: ‘What a waste of all that talent, of be seated at Wormwood Scrubs.
Nines was known as the “Big Boss” to his co-conspirators and referred to cannabis as “Cali” in his posts, the court said.
The 31-year-old musician had previously been jailed for 18 months for possession of cannabis with the intention of providing it.
The star, from Harlesden, north-west London, won the MOBO Award for Best Hip-Hop Group last year.
Her third album, which beat Metallica to No.1 on its release, was also named Album of the Year despite competition from Stormzy, J Hus, Lianne La Havas and Mahalia.
The rapper rose to prominence with his 2017 debut album, One Foot Out, which reached number four on the charts.
His songs have accumulated millions of listenings on streaming platforms and he has collaborated with Dave, Ray BLK and SL.