My photoperiodic Royal Highness (from RQS) was set...

Hi, It's quite unusual for photoperiodic plants to show pronounced flowering after just two days of the 12/12 cycle switch. Typically, it takes at least a week or two for noticeable changes to appear. However, there are a few possible explanations for what you're seeing: Pre-flowers: Sometimes, plants will develop pre-flowers during the vegetative stage, especially if they've been under 20/4 light for an extended period. These can become more pronounced with the switch to 12/12. Genetics: Some strains might exhibit faster transitions than others. While it's uncommon, it's possible that your Royal Highness strain has a particularly responsive genetic makeup. Autoflowering Seed: There is a slight chance that you might have received an autoflowering seed by mistake. Autoflowering strains can start flowering based on their age, regardless of light cycle changes. To be sure, keep observing your plant over the next week. If it continues to flower normally, it might just be a quick responder or a rare genetic trait. If you suspect it might be an autoflowering strain, you'll still get to enjoy the flowers, just on a different timeline.