in a place where we can garden all year round, where the birds mostly stay around here all year and where we don't have most of the plants on the lists mentioned already, this can be a frustrating proposition.
But I have noticed a few things that are always true (even when the weather is unpredictable and we're getting crazy hot spells in winter and vice-versa)-- when the shiso starts making flowers, I have about two weeks before a cold snap comes and it's time to think about shifting away from summer plants to fall. And the persimmon
trees will start to turn color (the only fall color we get): this year the persimmons are already being harvested, but the leaves haven't turned yet, a sign that we have a bit more time before the cold gets here.
The same thing applies for when shiso starts to explode into growth in the spring-- a few loners will come up all winter, but the self-seeded volunteers will all shoot up only after the last threat of cold is past.