Hi there, Joseph! You can if you'd like. The biggest difference with feeding your starter White Whole Wheat Flour vs. All-Purpose is that you should expect it to ripen faster (and start to smell sour and tangy more quickly). This is normal. If you continue feeding the starter with whole wheat flour, you'll find it ripens quickly unless you put it someplace cool to slow down that fermentation; such as the fridge. If you don't keep up with a whole wheat starter, then it can become over-ripe faster than you might like. As for baking with it, you can still use your whole wheat starter the same way you would if it was fed with all-purpose without adjusting the flour or water in the rest of the recipe; 1 cup weighs roughly 8 ounces or 227 grams. You might find that when feeding the starter you need a little extra water to make it the proper consistency, usually, only a tablespoon or so extra is needed though. Happy baking! Morgan@KAF

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