Comfrey (Symphytum officinale) is a perennial herb with several potential benefits, including: 
Medicinal Uses: 
Wound healing:
Comfrey contains allantoin, a compound that promotes skin regeneration and speeds up wound healing. 
Soothing skin conditions:
Comfrey has anti-inflammatory properties that can help soothe skin conditions such as eczema, psoriasis, and burns. 
Astringent effects:
Comfrey contains tannins, which can help tighten and constrict tissues, making it beneficial for treating minor cuts and bruises. 
Garden Benefits: 
Compost activator:
Comfrey leaves are rich in potassium, nitrogen, and phosphorus, making them excellent compost activators. 
Mulch:
Chopped comfrey leaves can be used as mulch to suppress weeds, retain moisture, and add nutrients to the soil. 
Dynamic accumulator:
Comfrey has deep roots that can draw up nutrients from the soil, making it a dynamic accumulator plant. This means it can help improve the fertility of the soil over time. 
Pest control:
Comfrey leaves can repel some pests, such as slugs and snails. 
Other Benefits: 
Fertilizer: Comfrey leaves can be fermented to create a liquid fertilizer that is rich in nutrients. 
Dye: Comfrey roots can be used to produce a blue-black dye. 
Note: It's important to use caution when using comfrey, as it contains pyrrolizidine alkaloids (PAs) which can be toxic if consumed in large quantities or over long periods. Pregnant and breastfeeding women should avoid using comfrey.