Watch her show "The Edible Garden" here - I'm in love with the way she makes her urban Victorian backyard both beautiful and delicious! A few years ago, I happened to purchase her book Garden Anywhere, and was captivated by her description of comfrey tea, a liquid fertilizer you can make at home from the leaves of the comfrey plant.
Alys writes, "Once [comfrey] is established, you may never need to buy commercially made plant food... Comfrey is a deep-rooted, hardy perennial... Its leaves are high in potash, a source of potassium important for cell division, and also have good levels of nitrogen and phosphate".
Due to her glowing description, comfrey was the first plant I chose for my backyard when we landscaped, and it has done extremely well. Though I have trimmed it down several times, it is still huge and overshadows the rhubarb and chives it borders.
Large-leafed and hardy, comfrey has pretty purple blossoms when it flowers, though they have dried up at the moment, here in August.
The finished compost tea was a murky brownish liquid, which I ladled with a bowl over all the plants in my backyard. The scent was like a baby diaper left to sit for several days- unpleasant to be sure, but not unbearable. My plants look healthy and strong, with some new blooms on some of my vegetables when I thought they were finishing up. It's a project I would do again.
Note: It's important to keep the bucket covered to avoid attracting flies, as the moment the lid was off, they were all over that bucket. Also, Alys doesn't recommend using the comfrey tea on houseplants due to the smell.