All the growkits we offer contain mycelium of the same species - the differences between strains are not particularly significant and you will probably not notice any major differences in their development and cultivation requirements. If you are a beginner or this is your first experience with growkits, we recommend trying Golden Teacher or B+. These strains are considered relatively easy to grow and are known for their stability and resilience, making them a good choice for those starting their mycological journey.