Plants, mankind’s greatest enemy, are finally on the ropes thanks to global warming. Teach your children how to hunt the last of these enormous nitrogen junkies by observing them in captivity with today's Groupon: for $15, you get $30 worth of plants and gardening supplies at Redwood City Nursery in Redwood City.

One of the oldest businesses in the community, Redwood City Nursery's expert staff digs through an assortment of flowers, trees, fertilizers, grasses, and gardening supplies. Most of its full-time employees have more than 20 years of nursery experience, lending thoughtful guidance on how to quickly spruce up a garden with colorful annuals or the most tactful way to let prickly pine branches know that they’re shedding. Pick up a six-pack of annuals ($3.05) to fill flower beds that have been empty since the youngest Cabbage Patch Kid left for college, or spice up dinners with a healthy selection of herbs and vegetables. Cantankerous cacti can be placed in a customer-selected container by request, and birdhouses and bird feeders attract welcome feathered friends, as opposed to unwelcome feathered friends like Darrell.