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GuanoRomano 🌱 Week 0 – Germination / Seedling Start
Medium: coco + perlite
Pot size: 11L
Photoperiod: 18/6
📅 Daily Log
Pre-watering (Day -1): Substrate pre-soaked with pH 5.8, EC 700 → runoff pH 6.5, EC 1200.
09/11: Germinated seeds planted. Watered 20 ml at pH 5.8, EC 700. Added some Great White mycorrhizae before planting.
09/12: Watered 10 ml at pH 5.7, EC 350.
09/13: Seedling emerged 🎉. Watered 10 ml around seedling at pH 5.7, EC 350, twice.
09/14: Watered 30 ml twice at pH 5.8, EC 0.4. Seedlings starting to stretch, dimmer raised to 50%.
09/15: Watered 40 ml twice at pH 5.8, EC 0.5. Still stretching and leaning towards the light. Lamp raised to 80 cm, dimmer increased to 70% (~PPFD 120–200).
09/16: Watered twice, total 100 ml at pH 5.7, EC 650.
09/17: Watered twice, total 150 ml at pH 5.7, EC 650. Second set of leaves starting to show 🌱. Noticed small bugs, likely fungus gnats from the coco. Placed yellow sticky traps and will wait longer before next watering to let the coco dry out.
09/18: Watered once with 75 ml at pH 5.8, EC 700. Sticky traps are working — fewer gnats flying around.
09/19: Watered once with 80 ml at pH 5.8, EC 650. Plants showing light stress. Tried Photone for PPFD but not accurate; switched to lux meter and lowered intensity to keep under 15k lux. One seedling bent over to the ground, propped it up with wire support.
📝 Notes
Good progress overall, seedlings now developing their second leaves.
Stretching under control with light adjustments.
Fungus gnat issue improving thanks to sticky traps.
First signs of light stress → intensity lowered to safer range.
One weak seedling needed support, now stabilized.
Using osmosis water with Cal/Mag every watering.
🔚 Week Summary & Next Steps
Week 0 complete: seedlings are up, stretching controlled, and second leaves appearing.
Minor issues: fungus gnats and light stress, both managed.
Plan for Week 1: gradually increase watering volume, maintain stable light (~15k lux), monitor growth and root development.
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Used method
Paper Towel
Germination Method
1
Week 1. Vegetation
3d ago
1/3
8 cm
Height
18 hrs
Light Schedule
25 °C
Day Air Temp
5.8
pH
No Smell
Smell
325 PPM
TDS
75 %
Air Humidity
25 °C
Solution Temp
23 °C
Night Air Temp
11 L
Pot Size
0.1 L
Watering Volume
78 cm
Lamp Distance
Nutrients 3
Calmag
2 mll
Top Coco A
0.6 mll
Top Coco B
0.6 mll
GuanoRomano 🌱 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.
📝 Notes (ongoing)
Plants responding well to increased feed, EC slowly rising.
Sticky traps continue reducing fungus gnat population.
Light intensity being raised progressively to avoid stress.
Third node development underway, vegetative growth strengthening.