Harvest inquiry

Hi all, it’s been a bit how y’all doing? I have a couple questions I want to post pictures. What are the hazards when it comes to picking the right time to harvest? I want to let them grow as long as I can I want these bad boys as fat as possible but I don’t want to screw anything up. These are 12 OG Kush feminized seeds plants. They have been in a soilless mix in smart sax since they were babies. I have never had a bug problem with these plants, the last couple of days I noticed spots on the leaves and some little tiny aphids or spiders underneath some of the leaves mostly the leaves that have the spots. I’m not that worried about the bugs the plants really seem to look great. My main question how long can I let these go without messing anything up keeping in mind I am not in a hurry? I have Felt fortunate for the use of this for him from the very beginning, you guys are in valuable source for me. Any advice is going to be appreciated I am attaching one picture of hey leave with the spots that has the tiny little bugs underneath and 4 or five pictures of the Coelho’s. Thanks so much for your help as always Roger

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