I'm waiting until 6. For one, she seems to have a sensitive tummy like her brother did. Second, I prefer to skip purees and give hand food, so I'll wait until she can pick something up and feed it to herself.
Some time around 5 or 6. I'm not in a rush to do it as it makes their diapers disgusting and is more work than nursing. Lol
I'm going to do baby led weaning which means you skip purees all together. This is the first time I will be doing it but neither of my other kids were fans of most of the purees and I found myself wasting a lot of stuff. I'll start when they seem interested but not before 6 months.
We did BLW with Sam and started solids at close to 8 months. We have a strong family history of food allergies and wanted to take it slow. He did get some purees, but we made all his food so it wasn't entirely smooth purees. It was important to me to introduce food slowly with low allergen foods first, which meant not starting with grains (i.e. cereals).
I plan to do the same with Tim.
Cristan, I made all of T's food too, and plan to do the same for Reid too. Except it will be even easier this time because I turned my daycare lady on to making baby food, and now she does that for the babies in her care. When I started taking T to her daycare, the deal was that you had to bring your own baby food, but meals are included in the price once the kids start eating what everyone else is eating. I would bring a week's worth of frozen cubes of baby food for him, and taught her how to thaw them safely. She was really intrigued by the idea, so I let her borrow my baby food cookbooks (which you totally don't even need - basically it's cook the fruit or veggie and then puree it, but they do tell you how to freeze and store it and things like that which is helpful when you're first getting started.) Anyway, later she told me that now she offers homemade baby food as part of her price to watch babies. She's been doing it for almost 5 years now, and now we will get to reap the benefits once Reid starts. I thought that was pretty cool. But obvs I will still have to make them for meals at home.