at what age do male rabbits reach sexual maturity?

  when is the right age to have a male rabbit neutered
According to the House Rabbit Society, you should have it neutered after it reaches sexual maturity at 3.5 - 6 mos. http://www.rabbit.org/health/spay.html



I'm still not convinced it's necessary for a male rabbit, unless you're trying to provide him a rabbit friend.
Males can reach maturity at 3 months old and some mature faster than others. Most are mature by 4-5 months.

You can have a male neutered once his testicles descend. Some vets do set a minimum age. If the testicles have not descended, most vets will not neuter the rabbit as it is more invasive and costs more.
About 3-4 months . You can have them neutered from 4 months and should do if your keeping him with another rabbit, male or female.
Most male bunnies reach sexual maturity,. When they are about 3 months old.the best age to nueter a bunny is when hes Three or five months of age.