Vital Earth/Growise will launch four 10kg tubs: Fish, Blood and Bone, Garden Lime, Growmore and Bonemeal.
Scotts Miracle-Gro Company is also bringing a new product into the flower seed market.
Based on the technology of Miracle-Gro Patch Magic, Miracle-Gro Flower Magic is designed to help grow flower beds and borders. Its 3-in-1 formula contains a mixture of flower seeds, four-month plant food and shredded coir compost.
Scotts says the compost is the critical feature in ensuring success because it surrounds the seeds and resulting seedlings in a moist, protective layer, providing them with water and nutrients ensuring "incredible germination rates and plant performance".
The purple shaker jar sprinkles the flower seeds over the soil. Each jar will cover an area of 4sq m.
Three colour mixes are available and each mix contains a selection of plants, designed to flower from June/July until October.