citrus are some
prime examples. Oaks may even be
candidates. To be sure that you are
in a suitable area look on an
agriculture climate map and if you live in zone 11
you can do this successfully.
Remember their are micro-climates
that could allow you to plant these
further North.

Some orchid
candidates...
You will need to pair
the right orchids with the right
amount of sunlight that is
available. In a really sunny area
vandas would be a good choice to
start growing orchids on trees. In
shaded areas phalaenopsis or
cattleyas are a great choice. If you
need help an orchid grower will be
helpful.

How To...
The first rule you should
follow before attaching orchids growing on
trees is to attach it during the time the
orchids are growing their roots. For
example, if you are attaching a cattleya you
would do this during the months of January
or February. If you choose two months before
the orchid plants will bloom your in the
right timeframe.