Yes, both grow well, and you can find seeds at several online sources. I like Renee's Seeds a lot. She has both arugula and escarole in her greens mixes. Warning about arugula - do NOT let it go to seed, or you'll be pulling out arugula from your garden forever (ask me how I know this, lol!)

Patty S.

Here is a link that might be useful: Renee's Garden: Vegetable Seeds

Arugula is easy to grow. I have some in a shallow clay pot on my shaded patio so I can grow it in the summer without it getting baked. You do have to be vigilant about pinching back flowers.

Here is a link that might be useful: What's Growing On?