Can I keep home-made salad dressing un-refrigerated? My salad dressing has extra virgin olive oil (EVOO), raspberry wine vinegar, chives, sugar, salt &amp; pepper, lemon juice and lemon zest. Can I keep it un-refrigerated for 18 hours?
Me think you should be OK.

The dressing does not contain garlic which can be an issue in regards of botulism.

I don't know if chive has the same botulism problem as garlic, you might check that out