Citrus sinensis

Growing nicely on the sunny warm balcony, but occasionally getting warped leaves which turn brown. This suggests to me that it's getting too warm, as the tar sheet beneath the pots gets incredibly hot, too hot to walk on bare foot. It has also had a small caterpillar infestation.

Oranges still doing nicely in the conservatory, the back one will go in the propagator

Two orange seedlings grown from pips a few weeks ago. Doing nicely, I'll pot them in a week or so. Both pips produced two stems, is this normal?