While the garden bed Nasturtiums have long gone, shrivelled in the heat and dropping a load of seed, I have had more success in keeping them going in pots. One thing I did not realize is that they can be pruned back in a reasonably hard manner and they will regrow in a more compact and floriferous way. Container growing also makes it easier to control the amount of fertilizer they get as it is well known that excessive nitrogenous fertilizer will produce a mass of leaves with hidden flowers. Removing spent flowers stops them going to seed and thus shortening their life and though this takes a bit of extra effort there is no reason why these Nasturtiums will not keep on going all through summer and into autumn.
These 'Christmas red' ones will make a nice addition to the festive table in the coming days.