That's an often used common name. What plant are you referring to? Here pigweed can mean either an Amaranthus species or a Chenopodium species. Either way, I would expect these to do ok so long as you do not kill them with kindness. They thrive on neglect and poor conditions.

FataMorgana

haha, Palmar Amaranthus and spiny pigweed :)

Pigweed is also known as
Purslane
or Pursley. It's one of my favourite super weeds, containing many
vitamins and Omega-3 fatty acids. Pigweed tastes good and it grows
easily from seeds or from cuttings.
Look here for more info.