If you have problems mixing natural looking greens, then try Terry's ready mixed Artists Quality Acrylic Greens.
Three specially blended greens, Midnight Green, Country Olive and Sunlit Green, are made exclusively for Terry which help to create a natural looking landscape - the easy way.
This soft formula is ideal for keeping a longer working time and easy for blending and creating textures, the soft consistancy prevents the need to add too much water to the paint, thereby helping the paint to flow easily.
  
Sunlit Green - Pigments - Copper Phthalocyanine, Monoazo, Disazo, Iron Oxide, Titanium Dioxide.
Permanence A. Opaque.
Country Olive - Pigments - Copper phthalocyanine, Iron Oxides, Monoazo. Permanence A. Opaque
Midnight Green - Monoazo, Iron Oxide, Copper Phthalocyanine, Carbon Black. Permanence A. Opaque

Available in 56ml tubes.