Thanks very much for the pointers. I read the FAQ and then the QAF, as well as the googly stuff, but none of it could tell me watt Filler meant. In fact, there wasn't much info about Filler at all, so I asked my mum, who said she keeps her bulbs in the freezer for 8 weeks just before spring. I thought she was doing it to get frosted bulbs, but she reckons it's just to make them sprout faster. I don't think that's such a bright idea.........:?