Last year, I candled my JBP on July 4, and my new needles were still full length! We have a long growing season here in Georgia! I'm still working on ramification, so I expect that as that gets better the energy will get spread out, so July 4th will continue to be decandling day. Or, I may have to push it back to July 14th. Bastile Day.
Smoke, it's interesting that you do BOTH the "zoned decandling" where the weaker candles are done first and stronger ones two weeks later, and the "leave a stub" decandling techinque.