A bulb plant is a type of plant that stores energy in an underground bulb, which can be used to regrow the plant after it has died back. The four crossword solutions for the term 'bulb plant' are SEGO (4 letters), LILY (4 letters), LEEK (4 letters), and ONION (5 letters). Sego is a type of LILY native to the western United States, while LEEK and ONION are both members of the allium family. All of these plants store energy in their bulbs, allowing them to regrow after they have died back.