My Second grow: RQS Royal Critical Auto

Allright! So I'm back from a three week holiday. Paul stayed at home. I've tried top put him in a strategic place outside underneath my carport with the intention that it is able to catch as much sun as possible while still being covered from the rain. The rain usually comes from the west so I've put him on the south-eastern side of the carport about 30cm from the edge allowing him to catch the morning and midday sun while being mostly covered from the rain. My grandmother in law came by every few days to water all plants inside and outside the house. I didn't make it too complicated for her and just said "If this guy is dry, give him water. If he's wet, don't give him water. If he's moist, give him a bit of water" and didn't bother with nutrients. The weather these past three weeks were off and on, but mostly sunny and warm with one week of cloudy weather and some rain here and there. I was pleasently surprised when I got home. Paul grew very nice! From 10 to 44cm in three weeks. I did a thorough inspection and gave some nutrients, but that's all I had to do. He's starting to grow some hairs, so I guess it is in its stretching phase and entering the flowering stage There was a string of spider web here and there, but no spider in sight. Nor any other things for that matter. I have noticed what looks like mould or bugs or something underneath some of the leaves. The leaf of the picture is has the most of it. Some leaves also have green spots on them. I'll post questions for both of them. I'm not worried for the spots, but more for the thing underneath some of the leaves. Paul will also stay outside during the nights from now on. The carport is not an option since my car is there, but I have a doghouse with one open side where I will put him with the same idea as underneath the carport during my holiday. I am going to keep a close eye the following days since he has been alone for three weeks. See you next week!