55 days. NON-GMO, OPEN POLLINATED, HEIRLOOM.
Not spinach at all, but because it still keeps giving healthy green leaves during the heat when most spinach has gone to seed it does seem perpetual or never ending.
It belongs to beet family (Chenopodiaceae family) therefore it is often known as Spanish beet or Leaf beet, Swiss Chard Silver beet, Crab beet, and mangold.