Perfect for a variety of plant feeding applications. Ideal for all types of in-ground or container flowers. vegetables. trees. shrubs and houseplants. Makes feeding as easy as water. Automatically mixes the right amount of nutrients. Refill bottles are for use with the Miracle-Gro LiquaFeed Advance Feeder and LiquaFeed Universal Feeder. Each bottle covers 400 sq ft. 39786. 4 count. Makes feeding as easy as watering and takes the guesswork out of feeding.. Material: Plastic Color: Multi Dimensions: 5 inches long x 5 inches wide x 9 inches high.