Since I don't have enough sun to grow "regular" vegetables, I've taken to growing edible ornamentals. I did grow sorrel (Hibiscus sabdariffa), but needed too much to get enough sepals, so I switched up to cranberry hibiscus, which has edible leaves, buds and flowers that makes great teas. Some other edible ornamentals I grow are:

• Chaya - edible leaves and the bees and butterflies LOVE the flowers. It grow fast and large. Mine didn't bloom last year, but I'm hoping that once I take the bananas out, it will get more sun and bloom this year..
• Eddoe (a variety of Colocasia esculenta) - A lovely elephant ear plant with small edible roots. I got some purple-stemmed types this year with larger bulbs I'm looking forward to growing.
• Xanthasoma - an elephant ear whose young unfurled leaves are used to make callaloo, a Jamaican dish.
• Pigeon pea - a small tree with beautiful flowers that bees love, that produces pounds and pounds of peas every year. You can eat them green or let them dry on the tree, but the green ones are hard to shell, so I just buy them in cans at the store.
• Talinum - A pretty plant with small, pink flowers and edible leaves. It spreads like mad all over my yard, so every year, I transplant a few to eat and pluck out the seedlings to put into salads.
• Sweet potato - I planted sweet potatoes years ago, and found out I cannot get the potatoes out, because of tree roots, so I just eat the leaves and use it as a lovely ground cover
• Jerusalem artichoke - Just started growing these and can't wait to see how they do this year. Only had a few bulbs last year, so I'm just letting them multiply this year. Beautiful yellow flowers in the fall.
• Canna indica - tall, purple leaf canna that has very fat roots that supposedly can be eaten like potatoes, or sliced and fried, but I haven't tried them yet. I hear all canna roots can be eaten, but some taste better than others. My yellow cannas have small, running roots that don't look like they'd be good to eat.
• Malabar spinach - got some seeds from a friend, so I'll grow it this year. I've grown it before, and it's very delicious, plus the vines are pretty, especially the red when it gets the berries on it.
• Daylily - I only have a few, so I don't eat much of them, but every part is edible. The buds are delicious in salads, as are the leaves. The roots taste a bit like water chestnut.
• Lemon grass - I love the way it rustles in the breeze, it makes a great tea, and the bottom part of the stems can be used in stir-fries (especially Thai food).
• Tiny hot peppers - got a bunch of seeds from friends that I'm going to be trying this year to see how they do. I don't eat a lot of hot peppers due to reflux, so I give the peppers away.
• Elderberry - I grow this mostly for the bees, butterflies and birds, but I also love elderberry tea, and if I get enough berries, I'll make a little syrup, which is great on pancakes.

I hope I didn't forget anything.