Frances Tophill mentioned perennial kale (Cottagers’ kale & Taunton Deane kale) on Gardeners’ World – a staple of her vegetable garden. We still have a few cuttings. It is a sterile hybrid, so never runs to seed and can be harvested all year round. The curly kale and Russian kale are not sown until the end of May and we will have them later.
Here’s a few images of vegetables at Downside