Hey there Jonobo, i noticed some ever so slight nutrient burn on one of the leafs, that looks like a nothing thing but it probably held back your plant, and might have even stunted it forever. Next time you plant consider using normal garden soil or if you have to buy the soil then ask for the least amended soil , the one with the lowest NPK count (every soil has an NPK count on the package) . Anyway these still look okay to me, as you know these plants can take a while to lift off, but hopefully you'll have plenty of above ground action in the coming weeks. Hope this helps 🚀