I was told they take awhile to get their "feet" under them before they grow up and have found that to be true.
Not unlike @chemistry I've got a snail on my outdoor auto.
From what I noticed from my last grow compared to my current grow If they don’t like the climate they are growing in They will be slow to grow and stunted. You can look at my latest thread the garden guy is back and compare it to my last grow threads and see tlthe difference