In the unqualified realm of science fiction and fantasy, there have been genuine smart gadgets. Take, for example, Bobbi Anderson’s typewriter in Stephen King’s “The Tommyknockers,” which, when alien-enhanced, is able to tap Anderson’s thoughts into pages.

Try as they might, some people are incapable of keeping a plant alive. As easy as maintaining a regular watering schedule, proper lighting and keeping pests away seems, these black thumbs, as they’ve been termed, can still turn the hardiest species into compost after a few weeks. Two recent gadgets give a leg up to gardeners who can’t quite get the swing and offer a chance to bring the power of networks and databases to everyday life.