For that reason the trade is using circumference they use 3/4 cm , 4/5 cm , 5/6 cm and 6+ cm circumference for the size in-between 1 and 2 cm diameter this is more accurate Roland 2012/7/19 Peter Taggart <petersirises@gmail.com>: > In general Tulips seem to prefer alkaline soil. > 6 cm circumferance from Roland's list would be equivelent to just under 2 > cm diameter. > Peter (UK) > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ -- R de Boer La Maugardiere 1 F 27260 EPAIGNES FRANCE Phone./Fax 0033-232-576-204 Email: bulborum@gmail.com