Monty Don's outdoor melon trial (part two)

Monty compares the midsummer progress of his melon plants in each of the three locations - outside in the veg plot, outside in a hotbed, and inside the greenhouse. See which ones are thriving, in this clip from Gardeners' World, and find out how and why he encourages just a few fruits to develop and (hopefully) mature, rather than letting the plants romp away unchecked.