The AeroGarden Seed Kits feature the "Plug 'N Grow" Bio-dome Seed System. Each pod has a dome that creates a perfect, mini-greenhouse environment for young seedlings. The pod label helps optimize humidity for germination and identifies your plants. Inside is the pre-seeded grow sponge which balances the amount of water and air the young seedling receives. Each Seed Pod's placement in the AeroGarden is mapped inside the box. Each kit has its own nutrient tablets bagged and clearly marked for use in the correct order. These time-release, nutrient tablets contain everything: all the micro and macro nutrients each plant needs, plus seaweed and a patented secret ingredient that keeps the pH (acidity) of your tap water in the perfect range for growing plants. Imagine vine-ripened, fresh from the garden tomato flavor in the middle of winter. The Cherry Tomato Kit contains two Red Heirloom and one Golden Harvest cherry tomato plants bursting with flavor and color. Flowers bloom in 30 days, tomatoes appear in six weeks, with harvestable fruit within two months.