Walter Andersen Nursery is a premium nursery with two locations, San Diego, CA and Poway, CA and has been family owned since 1928. Both locations carry the full retail line of Gro-Power products from our standard products, our premium speciality fertilizers to our tablets and liquids.  They been selling Gro-Power products for over 25 years. For more information on Walter Anderson Nursery, visit their website at

One Comment

  • Jo Ann Robertso says:

    I have gardened my entire life, almost 73. My daughter and I are awe struck by how responsive ALL our plants and trees are when Gro Power was applied.
    We will not purchase another brand. Thank you for making such a amazing product.