Choose a sunny location with decent drainage, and be sure to consider that these plants truly do grow to be giants! Because the Thuja Green Giant grows so quickly, you should clear enough space to accommodate its mature size. If you are planting just one Green Giant as a specimen, clear enough space to accommodate its full width of ten to fifteen feet -- if you're planting a row or hedge of arborvitae, you will first need to decide how tightly together you want them to grow and then clear the necessary space to fit that aesthetic. Dig a hole slightly wider than your arborvitae's pot. Remove your arborvitae from its container and gently loosen the roots. Then, set it in the hole at the same width to which it was growing in the container. Add in some compost as you refill the hole, and water in the plant well. Apply mulch to help protect your arborvitae from drying out, and water it weekly for its first year of life. After your Giant Green Arborvitae is established, it will require very little care. These attractive and truly evergreen hedges are incredibly low maintenance, requiring little water or fertilization and happy to go without pruning.