Which seeds will sprout on a green roof...without care?

There's still much for us to learn about green roofs.  One question to answer is which plants will grow in a primarily inorganic medium without help. Here's what I tried on a rooftop recently...

Sugar beets, broccoli, white tomatoes, yellow tomatoes, green peas, okra (clemson spineless), okra (burgundy), dinosaur kale, green pumpkin, white pumpkin, banana melon, cucumber, nasturtium.

These seeds were a bit old, mind you, at least four years. Any idea which ones grew?

Two winners, white pumpkin and dinosaur kale! I wonder how each would do with a little TLC!
That's an experiment for next year.