Want ultra blooms from your plants and ultra convenience for you? Then get a Miracle-Gro® LiquaFeed® Ultra Bloom® plant food concentrate refill. Ideal for all outdoor flowering plants, including annuals and perennials. These convenient refill bottles fit the Miracle-Gro® Liquafeed Advance garden feeder (sold separately), which automatically mixes the right amount of plant food and water. No mixing, no guesswork and no mess to make, so seeding as easy as watering! Just attach the feeder to a hose, insert the uncapped refill bottle into the feeder, and spray.