Is it rude to blow your nose in a restaurant?

I took a survey about facial tissues and one of the questions was if it was rude to blow your nose in a restaurant. This made me think because I often wipe my nose in public or wipe with a slight blow (no noise) and I always think this is okay. I have allergies, so during certain times of the year, it is necessary to wipe my nose, somewhat often – but to be clear, it is not running down my nose, just a little moist and should be wiped. Same with people eating spicy food or soup – sometimes you need a wipe, right?

I do agree that it is disgusting to do a big honkin blow or incredibly “productive” blow anywhere in public other than the bathroom. What are your thoughts?