The best replacement for nettle is stinging nettle.

The best alternatives to nettle are rated as following:
★★★★★  stinging nettle
★★★  saw palmetto
★★★  needle
★★★  jellyfish
★★  nettle root
★  henbit
★  nettle
★  nettle leaf
★  nettles
★  dead nettle
  grasp the mettle
  thistle

Your alternative for nettle is not listed? Suggest!
Speaking about nettle, one probably shouldn't forget about quercetin.

Other search terms related to nettle and their ratings are:
★★★★★ quercetin
★★★ saw palmetto
You have in mind a companion for nettle and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of nettle in all years. Click on graph for more.
nettle
stinging nettle
saw palmetto