What Are the Moisture Requirements for greater musk mallow?
Moist but well drained

greater musk mallow · Malva alcea
Also known as: hollyhock mallow; vervain mallow
Prefers to grow in light, well-drained, moderately fertile soil in full sun. It is likely to need support especially if grown on rich soils - see staking perennials. Can be short-lived
Moist but well drained