[nafex] near-monoecious citrumelo?

I have a beautiful citrumelo tree in my greenhouse that seems to produce nearly all imperfect (male) flowers. I didn't think citrus did that. Has anyone seen this before? Can I somehow convince it to be a little more balanced about sexual matters? I'm not exactly in citrus country so there's not a lot of local knowledge...
Michael Bove
Teakettle Farm, Z6 (MA/RI border)

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