Two hippos in one box

KraftKlotz Week 1 – Early Vegetative Growth (Day 8–14) Status: Transition into vegetative phase Growth rate increased noticeably. Leaf surface expanded and photosynthesis stabilized. Focus during this week was on root expansion and establishing a solid plant structure. Setup & Conditions: Light: gradually increased to approx. 300–320 PPFD Climate: stable with constant air movement Watering: adjusted to rising consumption Nutrients: still mainly provided by the soil, no aggressive feeding Observation: Even leaf development with no discoloration. No signs of nutrient stress or overwatering. Plants began expressing their natural growth pattern.

KraftKlotz Week 1 – Early Vegetative Growth (Day 8–14) Status: Transition into vegetative phase Growth rate increased noticeably. Leaf surface expanded and photosynthesis stabilized. Focus during this week was on root expansion and establishing a solid plant structure. Setup & Conditions: Light: gradually increased to approx. 300–320 PPFD Climate: stable with constant air movement Watering: adjusted to rising consumption Nutrients: still mainly provided by the soil, no aggressive feeding Observation: Even leaf development with no discoloration. No signs of nutrient stress or overwatering. Plants began expressing their natural growth pattern.

KraftKlotz Week 2 – Established Vegetation & First Training (Day 15–21) Status: Strong vegetative growth, structure control begins The larger plant developed strong side branches. The smaller plant was topped to improve structure and canopy balance. First light defoliation and low stress training were applied carefully. Setup & Conditions: Light: approx. 360 PPFD using two Viparspectra P600 Photoperiod: 18/6 (5:30 – 23:30) Soil EC: approx. 0.6–0.7 mS/cm Root zone pH: approx. 6.2 Watering: demand-based and closely monitored Observation: Very good response to topping, LST and defoliation. No visible stress after interventions. Plants actively redistributed nutrients, older leaves acting as reserves.

KraftKlotz Week 3 – Vegetative Performance Phase (Day 22–28, current) Status: Transition toward high-efficiency growth After defoliation, LST and optimized light distribution, both plants showed visible growth within 24 hours. Light intensity is adjusted individually to balance plant size and development. Setup & Conditions: Light: Larger plant: approx. 410–412 PPFD Smaller plant: approx. 320 PPFD Soil EC: decreasing due to active uptake (0.65 → ~0.33 mS/cm) Watering: Larger plant: approx. 2.0–2.5 L Smaller plant: approx. 1.5 L Climate: Target RH: 53–63 %, later 45–55 % Strong air circulation, no stagnant zones Observation: Very efficient water and nutrient uptake. Leaves remain vital, no deficiencies, no burn. Clear resource shift from older leaves to new growth. Controlled development, no stress reactions. Overall Summary (up to now) Clear structure following GrowDiaries week logic Fully data-driven grow No panic actions, no blind feeding Plants behave exactly as expected under optimal conditions

KraftKlotz Day 31: Soil EC decreased from 0.68 to 0.56 mS/cm, clearly showing active nutrient uptake. Soil moisture continued to drop, plants are consuming water efficiently. Daytime VPD remained around 1.2 kPa, well within the optimal range for vegetative growth. Despite mild stress from recent defoliation and LST, the larger plant continues to develop strongly. The smaller plant is recovering as expected but remains behind due to age and training. Day 32: Early leaf symptoms indicate a temporary pH-related potassium and magnesium lockout, likely caused by a short-term pH drop below ~6.2. New growth currently shows no deficiencies, suggesting the issue is already stabilizing. Current status: VPD day: ~1.4 kPa VPD night: ~0.8 kPa (actively regulated via RH increase) Soil temperature: ~23 °C Soil EC: down to 0.22 mS/cm Soil moisture: 16.9 % (next irrigation due) Next steps: Upcoming irrigation with adjusted nutrient solution (EC 1.2–1.4 mS/cm, pH 6.5–6.6), focusing on restoring magnesium and potassium availability. Summary: The grow remains stable. Minor, temporary imbalances were identified early and are being corrected in a controlled manner. Both plants are on a solid trajectory.