Althaea rosea is a herbaceous perennial in the mallow family grown for its summer flowering. It prefers a sunny, south-facing position in fertile, well-drained soil of neutral to alkaline pH and a consistently moist root run. Rated H5, it is classed as hardy in the UK. Flowers appear in mid to late summer, suited to cutting and summer borders.

Hollyhock (Althaea rosea) flowers from July to September and prefers full sun in well-drained, neutral to alkaline soil on a south-facing site.

https://en.wikipedia.org/wiki/Alcea_rosea

Alcea is a genus of over 80 species of flowering plants in the mallow family Malvaceae, commonly known as the hollyhocks. They are native to Asia and Europe.

Althaea rosea

Hollyhock | Althaea rosea

Althea cannabina is a species in the genus Althaea within the mallow family Malvaceae. It flowers from July to September. Consult specialist sources or nursery information for precise cultivation requirements. Its summer bloom period is useful for planning flowering succession.

Althea cannabina is an Althaea in the mallow family that flowers from July to September; check supplier notes for cultivation guidance.