Footage of how Victoria's medicinal marijuana is harvested, pruned and turned into oil has emerged.

In a video posted online by the state's Premier Daniel Andrews, forensic testers can be seen planting and tending to hundreds of cannabis plants – the country's first approved crop.

Victoria became the first state in Australia to legalize marijuana use to help treat chronic illnesses.

As of this year, children with severe epilepsy will have access to it.

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Footage of how Victoria's medicinal marijuana is harvested, pruned and turned into oil was posted to Facebook on Monday by Premier Daniel Andrews

The country's first approved crop contains more than 150 plants

THC – the main constituent of cannabis - will be produced in oil, capsule and vapour form (pictured)

The state government spent close to $1 million in March to transport marijuana from Canada to treat 29 children suffering from the debilitating ailment, according to 9News.

'This treatment is going to change so many lives,' Mr Andrews wrote on Facebook.

The crop contains more than 150 plants and will be run by the Cann group.

The cannabis plants are grown and harvested in a secret location.

THC – the main constituent of cannabis - will be produced in oil, capsule and vapour form, 9News reported.

The crop will be run the by the Cann group and is held in a secret location

In the video forensic testers can be seen planting and tending to hundreds of cannabis plants

Health Minister Jill Hennessy said the government will now evaluate which adults could be eligible for treatment

It will also be made into a spray form so it's easy to use for children.

Health Minister Jill Hennessy said the government will now evaluate which adults could be eligible for treatment.

Additional medicinal crops have since been approved in NSW, Queensland and Western Australia.