Elephant's foot?

Sadly, I don't have a pet baby elephant so this is not one of its feet. Earlier this year Blipper Shygirl73 sent me four tiny seedlings of Baobab, a tropical tree, that she had grown from seed. I planted them up in my greenhouse and so far they have all been really successful; this one has now reached 26cms high, with a trunk diameter of 4cms at the base, and the other three aren't far behind. I've put a picture of the whole thing as an extra.

I'll be interested to see how big I can grow them. Apparently in their natural habitat they can grow up to 30 metres tall with a trunk diameter of 11 metres. I may need a bigger greenhouse!