Kris: what a wonderful plant that Campanula fragilis,, I shall certainly keep my eyes open for it. Coming from Nepal it should hopefully grow well here.
Pim: Yes i like Rhodiola dumulosa very much. In the gravel it keeps low like this, But I saw one plant growing in compsot, and it was at least 4 times as big as mine. I'd say I perfer to keep it low. The plant grows on rocks on slopes; 1600-4100 m. Gansu, Hebei, Hubei, Jilin, Nei Mongol, Qinghai, Shaanxi, Shanxi, Sichuan, Yunnan in China and also in Bhutan and Myanmar.