"You could, but would you even be able to lift it?"

She'd need a separate spell to make all the ladles both big and weightless, otherwise they wouldn't really cut out the time needed to clear water from the hull.

"You could also transmute them into buckets, which might be slightly more useful for reducing the flood."

That is, if she even can. He still hasn't grasped what the breadth of her wizarding skill set entails.