They practically grow themselves, ignore them and they will thrive, poor dry soil is best. This has all been stated about Nasturtiums. I mean you sometimes see them growing by the side of the road! For whatever reason to date I have managed to kill them off. I can’t put my finger on exactly why but it looks like the tide has turned. As “companion plants” because I would hate for the veggies to be lonely I planted Marigolds and for the hell of it threw in one Nasturtium figuring it would soon be deceased. It actually appears to be thriving. This is exciting as not only is the entire plant edible with the leaves having a mild peppery flavor but they ward away whiteflies, aphids and other pests. I’m hoping keeping my Nasturtium alive continues to be a new trend.