What are these? Pummelo? Nine pound lemon?...

Probably Ponderosa lemons.

I do not know. Obtained as a noname lemon.
I thought that's Ponderosa, but the plant has many characteristics of grapefruit. Description Ponderosa in literature is different (Maybe just from different classification Swingle / Tanaka. According to Swingle both groups are too large)
It's maybe Pondrosa (hybrid lemon X citron) , maybe Lipo (hybrid lemon X grapefruit).

Personally, I think it's any hybrid between lemon, citron and grapefruit (or pomelos)

C. sinensis "Navelina ISA315"




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Tangelo "MaPo" ( C.deliciosa "Avana" x C.paradisi "Duncan" ... MAndarine X POmelo ), now with better colors

Do you like oranges?
It´s C. sinensis "Skagg´s Bonanza" now!

I'm jealous!

Tell me. With such large trees growing in such little containers, how often do you have to water them? It must be quite frequent. - Millet 80

It's quite frequent. In the warm summer days, twice, sometimes three times a day. For example hybrid lemon in the photo above needs up to 8 liters water per day

No, I do not. Only .... My office is in my house.
I do not smoke at home, I must get out to the garden. And then I water plants

Snek, why is it that you have not transplanted the trees into larger containers that are proportional to the size of the tree? I must say that your trees presently look exceptional, but they must certainly be root bound, thus the requirement for constant watering. The time will come that you will have to either prune the top and the roots, transplant into larger containers, or the trees will begin to decline. - Millet 80

Yes, it's true.
But very warm days are ten of the year. Usually I need only 50 liters water for all citrus together. In winter, three months nothing.

I have only very small garden and it is limiting me. Are also limiting our climate conditions and the need for manipulation of plants. Our climate is very different from the climate in citrus growing areas, but also in small containers is possible keep citrus in relatively good condition. When older and larger citrus, the greater is the problem.

Clementina grafted in 1993

Well, whatever you had done in the past must be working, as your trees are items that you can be proud of. - Millet 80

Where do you put your plants during the winter?

It is beginning .... Every autumn up and spring down