Riku might only hand out stuff if someone pokes/prods/drags him to do it. So he won't be handing things out on his own, but in groups (specifically the Lux regulars group), sure!

And I really hope we're allowed to plant any kind of plant even one from our characters canon, because I'd adore to be able to plant a Paopu tree ;w;

Who wants to plant a tree full of destiny fruit with Rikuuuuu? 8D He'll probably stick it in Sigyn's district.