1. Growing environment: Amaranthus spinosus generally grows in open fields, gardens or farmland, where the sun is abundant and the temperature is high, which is suitable for the growth of Amaranthus spinosus, while Amaranthus spinosus grows in humid and less sunny places, such as some grasslands and forests.

2. Adaptability: Because of their strong adaptability, Amaranthus spinosa can grow rapidly, covering a large area of land, absorbing a lot of water and fertilizer from the soil, consuming soil fertility, competing with other plants for water, fertilizer and sunlight, leading to poor growth of other plants and crop yield reduction, while Amaranthus spinosa can only grow in wet and sunny places, so Amaranthus spinosa has strong adaptability.