Hi,
as most Drosera, they grow a little slow on first, then they grow moderatly fast, well in my case!. I would recommand to get them in seeds, since you'll end with more plants, and this one is considered as an annual, so one day or another you'll have to sow them again! It is easy to cultivate, and the germination rate/speed is really increased with heat and high humidity, although it is not necessary (aka you can sow them as others sundews). hope this help