On Tue, 24 May 2011 17:15:28 -0600, "Suzanne"
wrote:


"Derald" wrote in message
...

Although, not likely to be a true "Seville" orange, the rootstock is
almost
certain to be a sour or "bittersweet" orange. Sour orange rootstock is
used for
its vigorous growth, adaptability to a wide range of growing conditions
and --
as you've experienced -- cold-hardiness.
[snip]


Interesting stuff. Are bittersweet oranges used for most citrus rootstock,
or just for oranges? My three dead trees were Eureka lemon, Bearss lime,
and Rio Red grapefruit.


It varies. In these parts "bush lemon" or "rough lemon" is often
used, that is "bush" meaning wild not like a shrub.

Google "citrus rootstock" 15000 hits

David