The variety of the microgreens are stamped using 3-letters on the back of the seed mat (this should be facing down when planting). RKT - RocketMIZ - MizunaKAL - Red KaleBRO - BroccoliCHI - ChiaPAK - Pak ChoiMUS - MustardCRS - Upland CressThe Rocket, Mizuna and Kale are fast germinating while the Pak Choi and Mustard may take a little longer. The Cress takes the longest at about 16-21 days.It's best to plant similar germinating varieties together.