The SNP must commit to "meaningful, progressive change" or risk being remembered as a "timid government", the Scottish Greens will warn.

Launching the party's conference in Perth later on Friday, co-convener Patrick Harvie will urge Nicola Sturgeon's government to prove its "progressive credentials", citing the "missed opportunity" of council tax reform.

Failing to do so will show the SNP have "caved-in to pressure from big business and sided with the Tories", he will add.

He will tell an audience at Perth Concert Hall that pressure from the Greens has already succeeded in making the government consider a young carer's grant and commit to not using benefit sanctions when work programmes are devolved next year.

Harvie will also point to Green campaigning in the run-up to the recent ban on underground coal gasification.

He will say: "With Scotland on the verge of being removed from the EU against our wishes, being stuck with a clueless and divisive Westminster government, and with the hateful and divisive Trump presidential campaign, Green principles of compassion, equality and openness are needed more than ever.

"We will play our part in making Scotland's voice heard, and we will continue to build the case for an outward-looking independent Scotland within the EU.

"We recognise that a minority government must work toward some degree of consensus across parliament and I promise that our engagement with the SNP will always be constructive."

Harvie will add: "The government missed a key opportunity to prove its progressive credentials by reforming the council tax and support Green proposals for a fairer alternative but there will be many more tests to come, including on aviation policy, where it's unthinkable that the First Minister could set a credible green agenda while backing Heathrow expansion and cutting air passenger duty.

"So to the SNP, we will offer our support if they commit to meaningful, progressive change in Scotland, using the limited powers of the parliament - if they don't take that opportunity they risk being remembered as a timid government that caved-in to pressure from big business and sided with the Tories."

The SNP said it will "listen carefully to constructive suggestions".

A spokesman said: "It's very encouraging to see another political party in Scotland stand unequivocally against the xenophobic, hard-right agenda of the Tory government at Westminster and commit to ensuring that all possible options are kept open to protect Scotland's place in Europe.

"The people of Scotland voted overwhelmingly to remain in the EU yet the Tories are dragging us to the EU exit door - and Labour and the Lib Dems seem content to give the Tory Brexiteers carte blanche to do whatever they want to Scotland.

"In government, the SNP is happy to work with other progressive parties and will always listen carefully to constructive suggestions."