In article , "tracey"
wrote:

hi all.. i have a house on a limestone bed.. practically.. and my lemon,
grapefruit and orange tree all have yellowing leaves.

No idea about the sulphur, but give them plenty of organic matter to buffer
them from the alkaline soil as well.

--
Chookie -- Sydney, Australia
(Replace "foulspambegone" with "optushome" to reply)

"In Melbourne there is plenty of vigour and eagerness, but there is
nothing worth being eager or vigorous about."
Francis Adams, The Australians, 1893.