Comfrey liquid fertiliser
I plan to make my own Comfrey liquid fertiliser, as I have several plants that aren't thriving, due to poverty of the soil, which I will rectify in autumn, when I apply horse muck. Until then, I want to give all my plants, including roses, a feed. How often would you recommend applying it, and when to stop using it? The roses were fed with Vitax Q4, in early summer. Thank you!