I've got a Croton "Mammi" that I got about 6 months ago and it is doing wonderful! the new leaves are bigger than the original big guys, and I have been giving it as much sun as possible, 6 hours of direct sun and 3 to 4 of inderect bright sun (I have a south/east facing bay window).
From what I have read, the more sun, the more color, and NEVER let it dry out. The first three months proved that...
I gave it tons of sun, but let it dry out between waterings. I thought it was getting over-suned, and that was why the new leaves were falling off. So I moved it to a less direct sun location, learned I shouldn't let it dry out, and began proper watering. Then all the yellow/red leaves starting turning green. When I moved it back into full sun, placed it in a try of small pebbles, almost full with water, and always kept it moist, it starting some healthy growin'......
good luck! Please let me know what you find out.
One of my stems is
growing MUCH better than the other, and I can't seem to figure out why.
be careful of spider mites, I spray the undersides each morning! is your's the same as mine, with twisting leaves?