My batches turn out excellent. Some tips, if you'd like to try again:

- Harvest the younger leaves, remove the stems.

- Harvest before they go to seed, or remove all seeds.

- Make a tea from the leaves by soaking in hot water. Do not let the water boil or simmer with the leaves!

- Add a healthy portion of lemon juice. I'll use 1/2 to 1 cup for a 20L batch.

- Use brewing sugar, or invert your sugar.

- Choose a yeast that doesn't impart too much of its own flavour (I like ale yeasts, like for ciders).

  For me, the choice of yeast was key.

Thanks! I def. did not pay attention to the younger leaves parts. I remember using a coder yeast. The dish described in OP was fine btw!

Nettle tea's nice, from what I remember. Use the young tips of the plants.

Thirding. Extremely wholesome and warming. I need to get some more of that it has been a while.

I can second this, add just a tiny bit sugar and it is delicious