I have a yellow pomelo, most likely been the 'Mato Butan' and a red pomelo tree which is very big and it is most likely the 'Chandler' variety.
In my garden I also have a seedless lemon tree, a lemon tree that produces seeds, a bitter orange that does not produce seeds and a sweet orange that produces seeds. These are grown near my pomelo trees and there is an open way for cross pollination. My two pomelo trees produce a lot of seeds (50 - 70 per fruit of both varieties).
If I plant those seeds do you think they will produce a pomelo? It would be quite a fan project to start and see the results after years.
If my pomelos are crossed with my sweet orange then they should not have seeds. But what about my bitter orange and lemons? And what about a cross between the two varieties?
Cross pollination is a possibility as your trees are really close and some ate producing many seeds. As far as what you get from the seeds it will be a crap shoot. You might get a pomelo that is close to the parent tree and you might get a new fruit. Cross pollination is a very controlled process when hybridization is the goal. Left to the whims of nature the results will be extremely varied. It would be a fun time to plant the seed and see what you get. Good luck & welcome to the forum.
True. Most pommelo will not produce viable seed after self pollination. If you would like to increase your pommelo, grafting is your best bet. They are tricky and do not come true from seed.....however you might get some interesting variations by planting seed.