F. magellanica is native in the Andes, and also along the coast down in southern Chile down as far south as the Straits of Magellan, which have a climate comparable to that of the Alaskan panhandle. Like most Fuchsias, its biochemistry is optimized for cool temperatures. At high temperatures, its chemistry slows down to a crawl which is why Fuchsias get disease prone in the heat and why I answer a lot of questions about "why is my Fuchsia dying" when the weather gets hot (and the answer is always the same...).

Is your seed fresh? I doubt it has long viability. If it's old seed I can probably send you fresh. This was a bad year for Fuchsias on the Pacific Coast but I probably have a few berries ripening on my Magellanica type by now. It's a small-flowered, short-tubed, small-leaved, extra-hardy type probably derived from "Riccartoni" (it looks just like Riccartoni), which, by the way, is almost never the real thing in the USA. It showed up as a volunteer in my garden, probably a chance seedling of a hybrid based on Riccartoni that reverted.