For real dazzling spring colour in containers nothing beats Senetti -bright daisy like flowers in amazing colours. It flowers early in the year and can be planted out from about march. Its not frost hardy but with tolerate mild frost so covering with garden fleece with keep it chipper on cold nights. Senetti has been bred from the houseplant Cineraria and is becoming more popular being available in DIY stores and supermarkets as well as garden centres.