Dawn Redwood (Metasequoia glyptostroboides) and Sequoiadendron giganteum start growing a bit later in the year than maples for example, but if you give them a big pot, when they grow they do so quickly. Mine at least trippled in weight this year.
Dont trunk chop dawn redwood in the growing season
I grow mine in peat and bark 50/50 but Im sure many mixes will work, and perhaps you can avoid dawn redwood disease issues if you use a more inorganic mix for that