Buy Green: Shampoo

Bar Shampoo From J.R. Liggett

Why We Like It: Bar Shampoo from J.R. Ligget is a vegetable-based cleanser that comes in a traditional formula for normal hair, a fragrance-free tea-tree-and-hemp version for people with allergies, and an aloe-and-almond concoction for people with damaged hair.

Eco-Factor: The bar is free of detergents?so your hair gets clean, but keeps its natural oils—and the bar format means less packaging, less shipping costs, and less plastic waste.

Favorite Scents: Rosemary and lavender and cedarwood, jojoba and peppermint.

Where: J.R. Ligget

How Much: $7

Shampoo From Nature's Gate

Why We Like It: Nature's Gate shampoo—with its creative lineup of subtle scents—comes in varieties aimed at dry, fine, or damaged hair and itchy, flaky scalps, so there's a bottle that works for you no matter your hair type.

Eco-Factor: Organic fruits, oils, vitamins, and herbs?including sunflower seed extract, ginger root, and kiwi?leave hair healthy, shiny, and soft; the company also refuses to use sodium laureth, lauryl sulfates, or other artificial ingredients.

Favorite Scents: Chamomile and lemon verbana, tea tree and blue cypress, Asian pear and red tea, persimmon and rose geranium.

Where: Nature's Gate

How Much: $8

Photo courtesy of Nature's Gate

Magic Pure Castile Soaps From Dr. Bronner's

Why We Like It: Dr. Bronner's Magic Pure Castile Soaps aren't designed just for hair?they also work on your body, pets, and home, making them a simple, eco-friendly way to stay clean without a closet full of products.

Eco-Factor: Dr. Bronner's soaps are certified organic and made under Fair Trade guidelines, with a vegetable-oil base that's 100 percent biodegradable. They also come in containers up to a gallon strong (so you won't have to buy so many smaller bottles) and, since you can use them anywhere, you can buy fewer cleansers overall.

Favorite Scents: Peppermint, rose, almond, and eucalyptus.

Where: Dr. Bronner's

How Much: $10 (for a 16-ounce bottle)

Photo courtesy of Dr. Bronner's

Rosemary Mint Shampoo Bar From Burt's Bees

Why We Like It: Burt's Bees Rosemary Mint Shampoo Bar is designed for medium or short styles, and includes peppermint for a refreshing tingle alongside rosemary oil for healthy locks.

Eco-Factor: Natural ingredients?including yucca leaf extract, nettle leaf powder, and avocado oil?keep hair clean and soft without parabens or chemicals, while the bar shape means less packaging.

Favorite Scents: The bar form only comes in rosemary mint, but other natural liquid shampoos from the company are available in raspberry and brazil nut, grapefruit and sugar, and pomegranate.

Where: Burt's Bees

How Much: $6

Photo courtesy of Burt's Bees

Shampoo From Aubrey Organics

Why We Like It: Aubrey Organics Shampoo comes in four types?formulated for dry, normal, oily, or damaged hair?to target any problem conditions; plus, there are special lines for swimmers (to fight discoloration), color-treated hair, and users with sensitive scalps.

Eco-Factor: The shampoos (and conditioners) are 100 percent natural, made from organic ingredients without synthetics and chemicals?and pack soybean oil derived from organic beans for extra strength.

Favorite Scents: Honeysuckle rose, green tea, blue chamomile.

Where: Aubrey Organics

How Much: $10

Photo courtesy of Aubrey Organics