🌱 Week 1 – Early Vegetative
09/20: Single watering of 90 ml at pH 5.8, EC 650. Solution included 1.5 ml/L CalMag + 0.6 ml/L Coco A + 0.6 ml/L Coco B. Increased volume but kept EC stable to avoid more stress after the light issue. Fungus gnats still present but sticky traps are working. Adjusted VPD range from 0.6–0.8 → 0.7–0.9 kPa to promote healthier transpiration.
09/21: Two waterings of 50 ml each at pH 5.8, EC 675. Solution included 1.5 ml/L CalMag + 0.7 ml/L Coco A + 0.7 ml/L Coco B. Returned to watering twice a day because with only one watering seedlings looked less vigorous. Third leaf set starting to appear 🌱.
09/22: Two waterings totaling 110 ml at pH 5.8, EC 780. Solution included 1.8 ml/L CalMag + 0.8 ml/L Coco A + 0.8 ml/L Coco B. Gradually increasing light intensity: center of the tent measured 11k lux, plan is to raise by ~1k per day until reaching 18k lux.
09/23: Flushed 3 pots with 2 L of water + CalMag (EC 400, pH 5.8). Runoff measured EC 1200, pH 7.0 — will keep correcting with future irrigations. After flush, watered with 150 ml at pH 5.8, EC 850. Light intensity increased to 13k lux.
09/24: Flushed the remaining pots with 2 L each after seeing improvement in the first 3 yesterday. Then watered all with 150 ml solution: 1.8 ml/L CalMag + 0.8 ml/L Coco A + 0.8 ml/L Coco B (pH 5.8, EC 850). Light raised to 14k lux.
09/25: No watering today — substrate still moist. Light intensity raised to 15k lux. Fourth leaf set now visible 🌱.
09/26: No watering today — substrate still humid. Reduced light intensity back to 14k lux after signs of light stress reappeared. End of the week.
📝 Week 1 Summary
Plants recovered well from early light stress, now developing 3rd–4th node.
Fungus gnat population reduced thanks to sticky traps.
Corrective flush helped bring down high EC and pH in runoff; feeding stabilized at ~EC 850.
Light management remains delicate: seedlings responded better under 14–15k lux, but stress appeared at higher intensities.
Overall: healthy vegetative growth is established, root system expanding, vigor improving.
➡️ Plan for Week 2
Gradually increase watering volume as root mass grows, monitor runoff closely.
Keep feed around EC 850–1000 with CalMag + Coco A/B, adjust if runoff EC drops.
Maintain light intensity at ~14k lux, increase very slowly only if plants show no stress.
Watch for continued gnat activity, keep sticky traps in place.
Target VPD: 0.8–1.0 kPa for balanced transpiration.