Blueberry Muffin – Pheno B | Week 4 Finding Her Own Rhythm Welcome back to another chapter of the 8×8 Adventure, where twelve cultivars are being documented individually from seed to harvest under a strict 12/12-from-seed schedule. Every phenotype follows its own diary, allowing each plant to develop independently and reveal the subtle differences that make every seed a unique expression of its genetics. Week 4 has been another exciting chapter across the entire room. The explosive growth that began last week has continued, and every day the garden feels a little more alive. Canopies are becoming denser, branches are reaching outward with confidence, and the room is slowly transforming into the miniature forest I imagined when this project first began. One thing that couldn’t go unnoticed this week was the environmental reading. 33.3°C and 63% humidity. Apparently the grow room has developed a strange obsession with the number three. 😄 Although temperatures climbed higher than I’d normally like, the relatively high humidity helped soften the impact, and the plants rewarded the stable environment by continuing to grow with impressive vigor. Sometimes nature reminds us that consistency is just as important as chasing perfect numbers. ⸻ Week 4 Environment 🌡️ Temperature: 33.3°C 💧 Relative Humidity: 63% 💡 PPFD: 700–800 µmol/m²/s 🌱 Medium: Plagron Lightmix ? Growing Method: 12/12 From Seed As the room continues to develop, another interesting difference is appearing naturally. The lighting itself hasn’t been increased significantly this week. Instead, some phenotypes are simply growing faster and moving closer to the fixtures. Those taller plants are now receiving around 800 PPFD, while the shorter individuals remain closer to 700 PPFD. It’s another reminder that no two phenotypes read the same instruction manual. Even under identical conditions, every plant follows its own pace. ⸻ Feeding Strategy The feeding program has also continued evolving alongside the plants. During the first weeks the nutrient solution stayed around pH 5.8, maximizing nutrient availability while young root systems became established inside the containers. Now those root systems have expanded considerably, allowing a slight shift in strategy. Throughout this week the solution gradually moved toward pH 6.1, while nutrient strength steadily increased, finishing around EC 1.8. The recipe itself hasn’t changed dramatically. No major adjustments. No sudden jumps. Simply a gentle increase in concentration to match the plants’ increasing appetite. Sometimes the smallest adjustments create the biggest improvements, and this week’s growth has been a great example of that philosophy. Allowing the pH to drift slightly higher also gives the roots access to a broader spectrum of nutrients available within the substrate, helping support the increasing demands of this new stage of growth. As always, the goal remains the same: Listen to the plants, not the feeding chart. ⸻ Blueberry Muffin – Pheno B This young lady has been quietly writing one of my favourite stories inside the tent. Unlike her sister, who seemed determined to impress from almost the very beginning, Pheno B decided to keep everyone guessing. Her first weeks were… let’s call them creative. The leaf structure wasn’t quite what I expected, growth was a little unusual, and every new set of leaves felt like another clue in a mystery I hadn’t solved yet. Fast forward to Week 4… The mystery is starting to make sense. She’s finding her own rhythm. Looking at her now, it’s hard not to appreciate just how much progress she’s made over the course of a single week. The unusual appearance that once caught my attention is fading into the background as healthy, vigorous new growth begins taking over the canopy. She’s still not trying to imitate her sister—and honestly, I hope she never does. Every phenotype deserves to express itself. The structure is becoming noticeably fuller, with side branches beginning to establish themselves beneath the canopy while the main stem continues building upward with confidence. Internodal spacing remains compact, creating a nicely stacked framework that should provide plenty of future flowering sites. One detail I particularly enjoy is the contrast between the older and newer growth. Fresh leaves emerge in a bright lime-green colour full of energy before gradually darkening as they mature, giving the plant a vibrant appearance that changes almost daily. Looking deeper into the canopy, more secondary shoots are beginning to appear than I expected only a week ago. She seems to be quietly building herself from the inside out, strengthening her framework before making any dramatic moves upward. There’s something very satisfying about watching a plant overcome an uncertain beginning. She may not possess the textbook symmetry of Pheno A, but she’s developing a character entirely her own. And sometimes, those are the phenotypes that end up becoming unforgettable. ⸻ Looking Ahead Week 5 should be another exciting milestone. With nutrient demand increasing, root development well established, and the first signs of flowering beginning to appear throughout the room, I’m expecting another noticeable leap in development. Over the coming week I’ll be watching closely for: • Stretch progression as flowering begins. • Continued branch development. • Response to the higher EC. • Structural differences compared to her sister phenotype. • How her unique architecture evolves as the canopy continues to fill. The slow start now feels like a distant memory. This week wasn’t about catching up anymore. It was about proving that she has every intention of writing her own story. ⸻ Thank You A huge thank you to everyone following this 8×8 Adventure and taking the time to visit these weekly updates. Thank you to the entire GrowDiaries community for providing a place where growers from around the world can learn, share experiences, and inspire one another every single day. A special thank you to Plagron for providing the nutrients and cultivation support that keep this project moving forward. Thank you to Zamnesia for the incredible genetics, equipment, and the opportunity to document each phenotype from seed to harvest. And finally, thank you to every grower who leaves a comment, shares advice, asks questions, or simply enjoys following these plants as they write their own stories. Every phenotype has its own personality. Watching those personalities emerge is one of the greatest joys of growing. 🌱💚🍇 Growers Love, and I’ll see you all next week.