Debbie says:

2. You can just put the > character in the visual editor. For example:
  • This is an indented space. And here is more
  • And more on next line.
You just need to make sure the space appears after the > character.

3. You can use our insert code option to do blockquotes. For example go in to edit a page, select the Widget icon, and select Insert Code on the right.

Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.

Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem.
Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur

... which obviously is not a blockquote, but instead a pre block.

Adam says:

Right. We don't have an exact "blockquote" feature. We can put it on our todo list. For now you could use an HTML snippet.

So let's try that. HTML snippet to insert blockquote:

As expected, an error: "The HTML you have entered is not valid HTML:"

So this really requires the Javascript-to-write-html workaround.