25 gifts under $25, No. 2: Upside-down agriculture

Your cousin wants a rooftop greenhouse but she can’t even keep a house plant alive for a week. A self-watering Boskke Sky Planter under the Christmas tree should help move things along. The stylish planter is made of recycled polypropylene and it hangs upside down from a ceiling hook. The self-contained water reservoir is foolproof, even for your cousin’s green thumb of death. The planter comes in an off-white color and even has a locking disc to defy gravity and can support a large variety of plants.

$18.75, at Sprout Home at44 Grand St., Williamsburg.