I have Meyer lemons, Bearrs lime, Juanita Tangerine, Changsha mandarins plus some trifoliate hybrids growing outside and in the ground. The best producer by a longshot is the Meyer lemons. however our growing season is short so for best results you must kick-start the bloom cycle in April otherwise the fruit will not be ready in time.  The Meyer lemons take about a year from flowering to using - so the tree must be kept above freezing through the winter - otherwise fruit loss will occur. I wrap the trees in incandescent Christmas lights, wrap in fleece then cover with a tarp. the light are turned on at freezing or below. My trees were planted 11 years ago and this process has seen them through the harshest of winters.

The non lemons have been problematic to get them to bloom - even though the Juanta Tangerine is 10' tall it has yet to bloom () I suspect it has to do with low heat and humidity. Ideas???

The greenhouse bushes seem to grow fairly well - as the trees thrive in the hot / humid environment.