Is red amaranth invasive?

Chef's answer
Native Americans used Amaranthus species as a food source for centuries. ... Although waterhemp, pigweed, and Palmer amaranth are problematic weed species of Amaranthus, the ornamental and edible types of amaranth are generally not considered invasive in gardens.
Frequently asked Questions 🎓
Amaranthus hybridus (smooth pigweed).
They readily regenerate if watered, and the young growth can be cropped at fortnightly intervals during summer. Red leaved cultivars turn a rather mournful deep mauve when cooked, but if the cooking liquid is saved to cook rice it will turn it a glorious claret-purple colour..
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