Is a Le Creuset really worth five times a Lodge?
Not for the cooking. Both are enameled cast iron, and iron holds heat the same way regardless of what is stamped on the base — on day one you could not tell them apart in a blind stew. The premium buys the enamel: how evenly it is applied, how it survives metal utensils and dishwashers, the light-coloured interior that lets you watch a sauce darken, handles sized for mitted hands, and a warranty from a company that will still exist in twenty years. If you keep cookware for decades and treat it without ceremony, that is a real purchase. If you are finding out whether you will use a Dutch oven at all, it is not.
What size should I buy?
Six quarts if you are unsure. Five to five and a half suits two to four people and leaves room on a standard oven shelf; six is the household default and handles a whole chicken or a sourdough boule; seven and above serves five to eight and is genuinely heavy once full — a seven-quart pot of stew coming out of a hot oven is a two-handed, both-mitts manoeuvre. Buy for the meals you cook most weeks, not for the one dinner party a year. A pot that is too big wastes heat and arm strength; one that is too small boils over at the worst moment.
Do I need to season enameled cast iron?
No, and that is the entire point of the enamel. Bare cast iron needs seasoning, careful drying and a wary relationship with tomatoes and acidic sauces. Enameled cast iron is ready to use out of the box, will not rust, and is indifferent to acidity — you can reduce a tomato sauce in it for hours. What it needs instead is care with the enamel surface: wooden or silicone utensils, no thermal shock from cold water into a hot pot, and hand washing even where a dishwasher is permitted.
Can I bake sourdough in any Dutch oven?
Yes, and that is why the cheap ones sell. The trick is simply a heavy lidded pot: the loaf releases steam in its first fifteen minutes, the lid traps it, and that steam gives a home oven the crust a bakery gets from a steam-injected deck. Any enameled cast-iron pot with a tight lid does this. Parmedu sells one specifically for it at five and a half quarts — the size that suits a standard boule — but you are buying size and price, not a special capability.
What temperature can they take?
Check the knob, not the pot. Amazon Basics publishes 500 degrees Fahrenheit, which covers every braise, roast and bread recipe you are likely to meet. The limit on most Dutch ovens is not the iron or the enamel but the lid knob: phenolic and plastic knobs have lower ratings than the pot itself, and some manufacturers sell a stainless replacement for exactly this reason. If a listing gives no oven-safe temperature at all, that silence is itself information.