I knew you'd know! ;-)
How like you to think that I will know botany, before the coffee even finishes making.
Nigella was a plant that I considered planting, but then I wanted seeds to every plant.....
Do a google search for largest seed in the world, amazing.
For winter color, plant the tops of the carrots or the top of a pineapple. Lemon and orange seeds will give you a pretty house plant.