Michel

Hi,

Nothing new about that;
I wrote that several years ago, already.

Several members of our club (usually good bonsaiists, though)
have trouble keeping Serissas, calling them "very difficult trees".
They all kept them invariably as (semi-)tropicals, thus taking
them indoors very soon (if at all having placed them outdoors
in summer) on the window till over the central heating:
great way to kill a Serissa, in my opinion.

Several other members -including me- however, have no
problems whatsoever with them (We find them extremely easy),
but with us they stay outside as long as temps don't go below
freezing point, and there's the big difference.
And when those temps finally do dip further, I store them
in my cool garage. If temps drop into freezing spells,
my azza's, maples, . . . go in the garage as well.

Only a few very winter hardy deciduous trees
(Malus, Prunus, Salix, Carpinus, ...)
usually stay outside, together with (usually) all conifers.

Only exception to this rule is right now a
Chaemacypharis Pisifera "Boulevard", a conifer I placed
in the garage as well for now:

Reason for that is another general rule: I never expose a tree to
icey temps if repotted after the preceding summer,
and this tree was (emergency) repotted last october.

On the other hand, I never risked leaving my Serissas outside
during (mild) freezing periods yet.

__________________
Greetz,
Michel