Indeed that's a good one ! Every year I end up having a bunch of oranges rotting on my desk at work after CNY

Kafka, hy don't you just eat them? They're mandarins - and it's a symbolism of luck to you.
OP, if you want to give a plant - but NOT white.
A pot of kam-quat oranges (those tiny lime-like things) or red flowers. You get the drift - red, orange and gold is good for the season ... white and black - no.
4 is not good either. In Cantonese, the sound rhymes with death so some Chinese have preferred not to use this number. Then again, I think the Teochews, Hakkas and Hokkiens etc don't really mind.
General rule - even numbers good ... odd numbers - no.