I planted a Page (mandarin) orange last summer and it is completely covered in flowers this spring. But I recently heard the Page needs Orlando Tangelo or Clementine Tangerine for cross pollination. Is this true? And how close to the Page does it need to be? A few feet or a few hundred yards? For example, could my neighbor have the Tangelo and would that still work or does it have to be much closer.

If it matters, I also have a meyer lemon, a persian lime, and a grapefruit (can't remember the type... maybe 'Flame'). The lemon and lime are in bloom but there's no sign of flowers on the grapefruit this year. It usually blooms later than the others.

Thanks!

Kate