Tip: Look out for the dwarf types of dahlias that will be much easier to sustain in a pot than some of the giant cactus and water lily types, which are better suited to garden planting.

"I lightly water mine after layering them into large pots or crates and then check them every month to see if any are mouldy or shrivelling up," he adds. Along with lifting your dahlias, you may also ...