Sea Kale

Looking to buy sea kale to grow as a perennial in zone 5b. North west Indiana. Anyone know a good sight to get some. Also can you buy this as seed or does it have to be a plant already. And if anyone else can suggest other perennial kales that grow in this cold climate that would be great.

Funny you should mention this. I saw some on etsy just this morning.

Curious to know more about this vegetable.

I've gotten seed from Restoration Seeds (https://www.restorationseeds.com/products/sea-kale), and they germinated wonderfully. Food Forest Farm has plants for sale (http://www.foodforestfarm.com/all-products/sea-kale), but if you're looking for quantity, I'd definitely go with seeds, as it's much cheaper that way!