I lost a megellanica, I think after a month frost (and had thought it was a good performer for cold) ... it is such a lovely fuchsia ... so sorry to hear your's is struggling. My lycioides' nearly perpetual gall mite disfigurement is something I welcome as a barometer of how well the others are fighting the mites. Maybe magellanica is a good candidate to cross with a more resistant fuchsia?