Looks like both might be owned and/or distributed by another company because I did find this :
WALNUT CREEK, Calif.--(
BUSINESS WIRE)--
Central Garden & Pet (NASDAQ: CENT, CENTA) (“Central”), a market leader in the garden and pet industries, announced today that it closed the previously announced acquisition of
Green Garden Products....Headquartered in Norton, Massachusetts, Green Garden Products is the leading supplier of seed packets and seed starter products for flower and vegetable gardens in North America, as well an emerging participant in the specialty soil category. The Company distributes over 3,500 SKUs under the Ferry-Morse, American Seed, Livingston Seed, McKenzie, NK Lawn & Garden, Jiffy,
SUPERthrive, Dyna-Gro and Seeds of Change brand names to a network of over 70,000 retail locations...
Central Garden & Pet Completes Acquisition of Green Garden
I also see this - on instagram, neither dyna-gro or Superthrive have posted anything in over a year.