I'm green with zone envy! There is a greenhouse in the neighboring city where I love to browse each spring. They have cool old glass houses with lots of stock plants and mother plants, and in the cool house there is a massive Rosemary plant, and in the pot with it is a clump of Freesias. As I recall, they typically bloom this time of year and make the entire greenhouse smell heavenly. After blooming the leaves are allowed to mature and dry naturally, then they lay dormant till the next winter. I think the bulbs are best somewhat dry during dormancy, but I believe the big Rosemary uses most of the water quickly during that time. I think if you use a free draining potting media they will be easy for you.
Rob, naturalizing Freesia is the coolest thing ever to me! I've never had any luck with them. Seems temps get too hot for them before they have a chance to bloom. Someday though, ....if I had a greenhouse!