The listing, Lemond Seeds has ended.
Lemon seed, like all citrus, have a natural dormancy period and so will require a period of cold temperature in order to initiate germination. Luckily, citrus fruits are usually pre-chilled as they are transported using a 'cool chain' system. If not, this can be overcome by placing the seed into the vegetable compartment of any household fridge and left for a few weeks. First, secure the seed into a paper towel by folding the towel it back on itself a couple of times, then place into a plastic bag or sterile food container before leaving it in the fridge.