As Parliament braces for another protest the legacy of the last has begun to sprout, with a slightly more green-fingered political message.

Protesters were seen during the 23-day occupation planting a range of produce, but as the clean-up continues it appears they left a little more than brassicas and coriander, with seedlings of the cannabis sativa variety beginning to show.

Gardeners working to restore Parliament grounds have confirmed to the Herald that in among a myriad seasonal vegetables and herbs in the rose gardens, they have discovered small cannabis seedlings.

Another of the seedlings next to a brassica. Photo / Michael Neilson

The Herald viewed - and smelled - half a dozen of the seedlings also, before they were destroyed by Parliament staff.

Tomato seedlings were also present. The Herald can confirm the two, while appearing similar, emanated different odours, one significantly more pungent.

The Herald has approached the office of Speaker Trevor Mallard for comment.

Possession and manufacture of cannabis remains illegal in New Zealand.

At the 2020 election a referendum on legalising cannabis was voted down.

Of the 2,908,071 total votes received, 48.4 per cent supported the proposed cannabis legislation and control bill and 50.7 per cent opposed.

The 23-day Parliament occupation, which focused on vaccine mandates but covered a wide range of grievances, came to a violent end on March 2 after police moved in on protesters, and fires were started on Parliament's lawn.

One of the seedlings found at Parliament. Photo / Michael Neilson

The Independent Police Conduct Authority last week announced they would investigate the policing of the anti-vaccine mandate protests.

Nearly 1900 complaints had been received - many from individuals who were not present at the protests but had concerns.

Marijuana seedlings found in the rose garden at Parliament. Photo / Michael Neilson

Dozens of police officers were also injured in the confrontations, with protesters seen throwing bricks and even LPG gas bottles at officers.

Some of the seedlings found at Parliament. Photo / Michael Neilson

Prior to that violent end, the protesters had built a village on Parliament grounds, with everything from food gardens to a daycare and ablution blocks.

Kale was also planted in the rose garden. Photo / Michael Neilson

Meanwhile, police have confirmed they are planning for the possibility of a second protest at Parliament this week.

One of the marijuana seedlings alongside a planted brassica. Photo / Michael Neilson

A website entitled "Unite" indicates it is planning 14 days of protest action in the capital, beginning at 9am on Friday, April 1.