Hi Audrey.
I only had one experience with a tropical WL and I bought it already sprouted from my pond store.
At this point in time, I am wondering if your warmer weather is close enough so that it won't be long before a tropical WL can be put into your pond. I know the hardy WL's put out their pads as soon as my water warms.
I wish I had more information for you.
Carolyn
