Grow Diary Granddaddy Purple
Growing Granddaddy Purple
Michael the Barred Owl
Weeks
Week Info
Week Number
7
Plant Height
51.5 inch
Day Air Temperature
74 ºF
Night Air Temperature
63 ºF
Light Schedule
12 hrs
Solution pH
6
Solution TDS
900 ppm
Air Humidity
50 %
Smell
Medium
Solution Temperature
62 ºF
Substrate Temperature
70 ºF
Pot Size
3 gal
Lamp to Plant Distance
10 inch
Watering Volume
4 L
Gallery
Comment
Granddaddy Purple - Week #3 of Flower (Early Flower)
Week 3 marked the end of stretch for both GDP plants, with GDP1 holding at 51" and GDP2 finishing at 52". Once vertical growth stopped, they shifted fully into bud development. Stacking tightened across all colas, early trichomes appeared on the sugar leaves, and the aroma deepened noticeably.
Two moderate defoliation sessions occurred this week which helped clear inward-facing and overlapping foliage, improving airflow and exposing developing bud sites. Light LST adjustments opened the canopy further, allowing even coverage under roughly 925–970 PPFD and DLI 40–42.
Day temps stayed in the low-mid 70s with cooler nights (low-mid 60s), and a stable VPD between 1.1-1.4. Water uptake remains high, and I am currently providing 1 gal of nutrients per plant every other day.
Nutrients transitioned smoothly from early bloom this week to a 50/50 early/mid flower blend at ~880–900 ppm with pH 6.0–6.1 and 5 ml/gal Cal-Mag. Both plants showed clean growth with no tip burn or deficiency.
By the end of Week 3, GDP had clearly entered mid flower: stacking strong, pistils heavy, resin emerging, and the canopy balanced from defoliation and LST. Both plants are primed for bulking going into mid flower.