Can two-year-old salvia miltiorrhiza seedlings be planted?

Two-year-old salvia miltiorrhiza seedlings cannot be planted. According to relevant data, the roots of salvia miltiorrhiza seedlings for two years will be lignified and cannot be planted. Growth habit and law of salvia miltiorrhiza Bunge. If salvia miltiorrhiza is planted in the south of the Yellow River, it must be harvested after growing for one year. If it grows for a long time, the rhizome of Salvia miltiorrhiza will be lignified, which will seriously affect the efficacy. Those planted in wasteland, forest land interplanting, high-altitude mountainous areas and areas north of the Yellow River can grow poorly and have small roots according to their growth conditions, and can also continue to grow for two years to harvest.