Can sunflower be planted in the land where Banlangen is planted?

Sunflowers can be planted in the land where Radix Isatidis has been planted. According to relevant public information, the land planted with Radix Isatidis has no influence on the cultivation of crops and medicines, and there is no problem in planting Solanum nigrum. Solanum nigrum does not refer to sunflower varieties from the United States, but to hybrid varieties introduced from abroad.