๐ผ Flowering โ Week 2 (Days 36โ42)
10/18 (Day 36 โ Start of Week 5):
Watered with the same nutrient solution as last week (2.5 ml/L CalMag + 1.4 ml/L Coco A + 1.4 ml/L Coco B).
Not adding PK yet โ Iโll wait until the stretch fully ends before introducing it.
Measured heights today: tallest = 122 cm, shortest = 61 cm, average = 84 cm.
Did not measure runoff this time.
10/19 (Day 37):
Average vertical growth today: +4.66 cm, showing the stretch is slowing down.
Watered again with the same solution as yesterday.
The canopy remains uneven, with clear height differences between phenotypes โ Iโll adjust pot heights soon to improve light distribution.
Plants look healthy overall, no visible stress or nutrient issues.
10/20 (Day 38):
Watered with water + CalMag + AN Micro (micronutrient maintenance day).
Adjusted the height of the shorter pots, and now PPFD across the canopy is much more uniform.
Average daily growth was +5.33 cm โ the defoliation slowed them down briefly, but theyโve regained momentum.
The tallest plant is now 132 cm, and Iโve had to raise the lights to their maximum height โ any further stretch could become a problem for space.
10/21 (Day 39):
Watered with the same nutrient solution as before, increasing total volume to 1.5 L per plant to achieve about 25% runoff.
Performed a massive defoliation โ foliage density was too high, and the dehumidifier couldnโt keep up with transpiration.
Suspect that the excessive stretch was partially due to insufficient light intensity, since readings were only ~360 PPFD when ideal for this stage is 500โ600 PPFD.
Raised light intensity to 430 PPFD to gradually correct this.
10/22 (Day 40):
Same watering as yesterday (1.5 L, ~25% runoff).
Runoff: EC 1000, pH 6.6
Plants look strong and are adapting well to the increased light.
Tomorrow Iโll introduce PK 13/14 at low dosage to initiate the first phase of bloom boosting.
10/23 (Day 41):
Watered with 1.5 L.
Introduced 0.3 ml/L PK 13/14 (first light dose) and 0.5 ml/L AN Micro after noticing one plant showing small brown spots between leaf veins (possible early micronutrient deficiency).
Runoff: EC 1000, pH 6.6
Plants look stable overall, no visible stress from new additives.
10/24 (Day 42 โ End of Week 5):
Watered again with the same solution as yesterday.
Input/Runoff: EC 1000, pH 6.6
Humidity has been difficult to control โ RH stays around 60%, which lowers VPD.
Planning to increase airflow and raise temperature slightly to improve VPD levels and moisture evacuation.
Week 5 Summary
๐ธ Stage: End of stretch and transition to full flower development.
๐ Growth: Height stabilized around 130 cm (tallest). Stretch nearly complete.
โ๏ธ Feeding:
Base mix: 2.5 CalMag + 1.4 A/B (EC 1300).
Runoff steady at EC 1000 / pH 6.6, indicating perfect nutrient uptake.
Introduced PK 13/14 (0.3 ml/L) and AN Micro (0.5 ml/L) for bloom support.
๐ง Watering: 1.5 L with 25โ30% runoff per plant. No salt buildup detected.
๐ก Lighting:
PPFD increased from 360 โ 430 ยตmol/mยฒ/s after noticing under-lighting.
Canopy adjusted by raising pots; more uniform distribution achieved.
โ๏ธ Defoliation: Heavy leaf removal on Day 39 to control RH and open airflow.
๐ก๏ธ Environment: RH stable around 60%, but VPD slightly low (target ~1.2 kPa).
Working to improve air exchange and temperature for better balance.
๐ฟ Overall health: Strong recovery after defoliation, no new deficiencies or stress. Early bud stacking visible.
โก๏ธ Plan for Week 6 โ Flowering Week 3 (Days 43โ49)
๐ฏ Objective: Consolidate flowering, strengthen bud sites, and maintain climate stability.
Nutrients:
Maintain base feed at EC 1300โ1400 ยตS, pH 5.8 ยฑ 0.1.
Increase PK 13/14 slightly to 0.4โ0.5 ml/L if no stress appears.
Keep AN Micro 0.5 ml/L once per week for micronutrient balance.
Environment:
Target VPD 1.1โ1.3 kPa (temp ~26โ27 ยฐC, RH 50โ55%).
Improve dehumidification and circulation โ consider stronger exhaust or intake fan cycles.
Lighting:
Increase PPFD to 500-600 ยตmol/mยฒ/s.
Monitor for any light stress at canopy level (tallest plants close to the lamp).
Defoliation:
No more heavy pruning โ just remove large leaves shading bud sites.
Observation:
Track bud swelling and trichome development.
Watch humidity closely during night cycles to avoid mold risk.