Bring a large kettle of water to a boil. Cook 12 ears of corn for 3 minutes. Refresh under cold water and pat dry. Repeat with remaining ears. Cut kernels from cobs (at least 10 cups).
In a large stainless or enameled pot, combine peppers, onion, water, olive oil, honey, vinegar, salt, celery seed, chopped savory, mustard seed, and garlic. Bring to a simmer; cook 5 minutes.
Add corn and bring to a boil. Reduce heat and simmer about 5 minutes, stirring occasionally to prevent sticking.
Mix a little hot liquid with turmeric; stir back into pot and simmer 2 minutes.
Ladle relish into hot pint jars, adding a savory sprig to each. Seal and process in boiling water for 10 minutes.
Notes
Yield: about 6 pints. Tester found it sweet; adjust to taste based on corn and honey.