"The Cannas are just loving the heatwave Malcolm, as long as I keep the soil damp. I've had to hand water a few on the corners of beds where the sprinkler is hit or miss depending on the wind. The really dwarf cannas are struggling though. They just don't have the storage capacity in their rhizomes. 'Pink Sunburst' is just fine. In full sun all day. This is one tough little Canna. The tiddlers are receiving extra TLC., but Sunburst doesn't need any."
Our thanks to Dale for such a detailed description, which adds considerably to our understanding of how our Cannas respond to the weather extremes. As a total contrast, the picture below shows the Canna beds at Hart Canna in England yesterday.