g'day paul,

not sure what they mean either mate in avacado's and some other
fruits/nuts you can have 'A' & 'B' varieties usually indicates one may
bud with male flowers early and the other may bud with female flowers
early so if you have both you get an earlier crop but in the end both
will fruit regardless of having the other there.

in persimmons they have 'astringent' & 'non-astringent', not sure
which way it is but one has to be ripe and soft to be eaten the other
can be eaten just before it gets to that stage, well if i rmemeber
correctly that is, it's something like that.



snipped
With peace and brightest of blessings,

len

--
"Be Content With What You Have And
May You Find Serenity and Tranquillity In
A World That You May Not Understand."

http://www.users.bigpond.com/gardenlen1