Growing Citrus in the Eastern Alleghenies

I'm curious to know what cycles others in Hampshire, Morgan, Mineral and Hardy Counties have witnessed in growing lemons, limes and other citrus.  The folks at Nature's Art in Cumberland (a very pleasant, easy place to spend money) started me growing lemons and limes last year.  Most start producing fruit in April and May indoors.  We move them outside after mid-May (about 10-14 days after the predicted last frost).  Yesterday one of the limes produced a new flower, even with nearly mature limes already present.

(click for a larger view)