If I was told I could only grow one type of plant it would be truly awful and so difficult to choose, but I would definitely select something herby. As well as the wide array of delectable food-enhancing flavours on offer, and many reputed health benefits afforded therein, many herbs are low-maintenance and fantastic for wildlife to boot. I grow many different varieties across my gardens, and I will always find room for more at every opportunity because they are such good companions to grow.
Just some of the ways I grow herbs include a dedicated gravel-come-rockery outside my polytunnels which helps to draw pollinators to the plants growing within. I also grow coriander