No food, no plants, no flowers. All very well intentioned and the family is always grateful for them, but many families are literally innundated with both. Seems like a strange thing, but the stress of dealing with leftovers and what to do with plants is just not what you want to be spending time doing.
Donate to the families choice and then in a month or so, bring over a dinner or gift card for a dinner out. If you want to do something immediately, buy containers, foil, plastic wrap, paper plates etc. and bring them over.