I know Lubavitchers are makpid to use only Esrogim from Genoa (if not grown there, at least that species). What do other communities use? Does anyone still use Korfu?
Those that have the Minhag to put out greenery in the Shul on Shavuos, why do we do it?
What is the earliest source mentioning the Minhag that Jews put out greenery on Shavuos?
Why is there a custom to hang up flowers and growing green things on shavuot?