Hey there,
It's great to hear you're growing the Strawberry Gorilla Auto! I've actually grown this strain before, and let me tell you, it's a real beauty.
At just 13 days old, your plant is still in its early stages of growth. While some plants might show more rapid development than others, it's entirely normal for them to vary in size at this point. Remember, every plant has its own pace.
From my experience, I've noticed that some auto-flowering strains, including the Strawberry Gorilla Auto, can start off a bit slow in the beginning but then really take off as they enter their vegetative stage.
I would ensure thorough watering of the entire pot, not just the area around the plant, to promote robust root development.
Happy growing, and feel free to reach out if you have any more questions along the way! ๐๐ฆ๐ฟ