First signs of pistils in previous week, day 25. Light schedule flipped on day 21. Very slight signs of CalMag deficiency spotted on day 29 (flowering day 4) so a light application of CalMag was applied and will continue in order to support nutrient transfer and root health. The plants both responded well and look very healthy.
It's during this week that my suspicion was confirmed--I accidentally mixed up one lemon haze with one lamb's breath. Photos from the following week will show the correct plants together. The rapid budding on the lemon haze (left in the photos) and the shape of the buds quickly made me realize the mix-up. With very careful maneuvering, I was able to switch the plants and it's responding very well. Updates next week!