Growing lemon tree from scratch (in a pot) - need advice on how to get the "tree" to flower within say 3 years instead of 10?

I have a "glass balcony" in the south of Sweden (in principle it can function as a greenhouse), where I want to grow a lemon tree or two in some large pots. I will bring the plants indoors during winter. I want to grow from scratch from seeds from a lemon. This is possible I have heard, but it may take 10 years before the tree flowers and it may not even flower at all I have heard. But I have also heard that grafting from a mature lemon tree may make it flower sooner. Or can you add some artificial plant hormones somehow and get the same result? Can you buy plant hormones somewhere (on the web)?
Thanks in advance for any relevant reply!
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I have never heard of any such hormones. Growing from seed is a very unlikely method of getting lemons. Even after the years that you mention it will probably turn out to be useless. There is a lemon that would grow well with you and be quite happy in a container~~Meyer's Lemon.[Sp?] Keep the winter temperature at 10C-50For above. It should be available from the centres in Malmo, Stockholm or Uppsala. It fruits well with good sized lemons and is fairly expensive but well worth it. You have a lovely country. How does anyone find their way driving in Stockholm? Best Wishes Brian 'flayb' to respond.

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