Growing Granddaddy Purple

MichaelTheBarnOwl Grow #5, Entry #2: Entering Early Veg Days Since Emergence: 11 Granddaddy Purple transitioned into early vegetative growth during this period following 9 days in the seedling stage. By Day 11 post-emergence, both plants had established two fully developed nodes while a third node actively expanded. Vertical growth accelerated relative to the prior week, although plant structure remained compact with tight internodal spacing and controlled upward development. Irrigation strategy shifted during this stage away from localized seedling hydration and toward establishing a broader active root zone. Because this grow utilized PRO-Mix HP-CC Mycorrhizae High Porosity, feeding was maintained with every watering event to provide consistent nutrient availability within the inert media profile. Irrigation continued to be applied in a circular pattern surrounding each plant rather than directly at the stem in order to encourage lateral root expansion and avoid concentrated root establishment beneath the crown. Watering volume increased progressively in response to increasing transpiration demand and continued root development. At the beginning of the second week of growth, approximately 0.25 L per plant was applied on an every-other-day schedule. By Day 11, irrigation volume increased to approximately 0.33 L per plant per event. Water pH remained tightly controlled within a target range of approximately 5.8–6.0. Nutrient strength continued increasing gradually as plants transitioned toward sustained vegetative growth. General Hydroponics Flora Series remained configured for Early Veg, with overall solution strength increasing from approximately 340 ppm on Day 7 to 440 ppm by Day 11. Supplemental CAL-MAG increased from 2 ml/gal to 3 ml/gal to support increasing metabolic demand and continued vegetative expansion. Silica supplementation had not yet been introduced during this stage. Near-infrared supplementation remained incorporated at both the beginning and end of the photoperiod for a combined 30 minutes per light cycle, while UV-A exposure increased from 15 minutes earlier in the week to 30 minutes per light cycle. Light intensity was increased incrementally throughout the period while fixture height remained fixed at approximately 20 inches above soil level, allowing canopy distance to decrease naturally through plant growth rather than repeated fixture repositioning. At the beginning of the week, measured light intensity remained near 370–385 PPFD (24–25 DLI). Fixture output was gradually increased from 50% to 55% power as plants demonstrated the ability to utilize additional intensity without undesirable stretch. Day 11 Light Measurements: GDP1: 460 PPFD (30 DLI) GDP2: 460 PPFD (30 DLI) Day 11 Plant Heights: GDP1: 3.50" GDP2: 3.75" Final canopy distance narrowed to approximately 16.25 - 16.50 inches by the end of the period.

MichaelTheBarnOwl Grow #5, Entry #3: Vegetation, Topping, and Preparation for Flip Days Since Emergence: 21 Granddaddy Purple progressed rapidly through vegetative growth during this period. At the previous entry (Day 11), plants had established two fully developed nodes with a third actively developing. By Day 12, the third node continued expanding with a fourth developing. By Day 15, all plants had established four nodes with a fifth developing. By Day 19, both plants had established five nodes with active sixth-node development. Day 19 marked the first structural training event of the grow. Plants were topped above Node 5 and Node 1 was removed, leaving four branch sets per plant as the intended structural framework moving forward. As of this entry, plants have been recovering from topping for approximately two days. Recovery appeared favorable and growth resumed quickly following the cut. Low stress training was now underway. Pre-Topping Heights (Day 19) GDP1: 12.00" GDP2: 13.00" This period also marked a transition in cultivation approach relative to prior grows. Previous runs had been performed in amended soil systems, while this grow utilized PRO-Mix HP as an inert medium. Nutrients therefore continued to be supplied with irrigation events throughout the period. Looking back, irrigation volume increased more aggressively than necessary early in the cycle as I adapted to the different watering behavior of the new media. The approach did not create observable issues, but this grow became an early lesson in adjusting irrigation strategy to the medium rather than carrying forward assumptions from previous runs. As a good friend of mine says: "experience is life’s greatest teacher." Water volume increased from approximately 0.5 L per plant every other day on Day 11 to approximately 1 gallon per plant every other day by Day 21 as plant size and water demand accelerated. Nutrient strategy progressed alongside growth stages, transitioning from Early Veg (Week 1) into Early Growth (Week 2) and finishing the period in Late Growth at Light concentration. Overall solution strength increased from approximately 440 ppm to 800 ppm. CAL-MAG increased from 3 mL/gal to 4 mL/gal, while silica was introduced during this period and increased gradually from 0.5 mL/gal to 2 mL/gal by the end of the week. Lighting was adjusted upward to match increasing canopy demand while maintaining controlled structure. Fixture height increased from approximately 20 inches above soil to 23 inches mid-period, and later to 25 inches. PPFD began the period in the mid-400 range and increased to approximately 575–600 PPFD prior to topping. Following topping, dimmer output was briefly increased from 55% to 60% before returning to 55% to maintain a more appropriate post-training intensity range. Day 21 Light Measurements GDP1: 565 PPFD (37 DLI) GDP2: 585 PPFD (38 DLI) UV exposure remained unchanged at 30 minutes per light cycle throughout the period. Day 21 Height Measurements GDP1: 12.50" GDP2: 13.50" Looking back, this was also the grow that changed how I approached photoperiod structure management. At the time, I was applying techniques that had worked well in prior autoflower runs. In later grows, this experience led me toward earlier topping, earlier flowering transitions, and greater emphasis on structural training to maintain height control.

MichaelTheBarnOwl Grow #5, Entry #4: Transition Post-Flip Days Since Emergence: 28 Days Since Flip: 5 Following topping on Day 19, plants were allowed approximately four days of recovery before initiating the transition to flower. The photoperiod was flipped to 12/12 on Day 24 post-emergence. This entry documents Day 28 post-emergence (Day 5 post-flip), capturing the beginning of transition growth and early stretch response. During this period, vertical growth accelerated substantially following the flip while structural training continued to maintain canopy control. Low stress training was deployed across all primary branch sets and selective removal of lower growth began intermittently to improve airflow and reduce congestion near the base of the canopy. To maximize available vertical space, plant stands were removed entirely from the tent. Light intensity increased gradually in preparation for flower initiation while avoiding abrupt environmental changes. Measurements at the beginning of the period remained near 565 PPFD (GDP1) and 585 PPFD (GDP2). By Day 28, canopy measurements increased to 625 PPFD (27 DLI) for GDP1 and 650 PPFD (28 DLI) for GDP2. Fixture output increased from 55% to 60% during the week while plants entered rapid vertical expansion. To maintain appropriate canopy distance, fixture height was increased three times, raising the distance from soil to fixture from approximately 27.5 inches to 33 inches. Final canopy-to-light distance measured approximately 9.5–10.5 inches. Nutrient strategy transitioned alongside the change in photoperiod. Feeding progressed from Late Growth at Light concentration into a 50/50 blend of Late Growth and Early Bloom at Medium strength. Overall solution strength increased from approximately 800 ppm to 900 ppm by the end of the period. CAL-MAG increased from 4 mL/gal to 5 mL/gal, pH remained tightly controlled between 6.0–6.1, and silica continued at 2 mL/gal every other feeding. UV supplementation increased from 30 minutes to 45 minutes per light cycle during this period. The transition response became increasingly apparent by the end of the week as plants continued stretching while recovering from topping and adapting to the new photoperiod. Plant Height - Flip Day vs. Flip + 5 Days: GDP1: 17.00" → 24.50" (+7.50") GDP2: 18.50" → 25.50" (+7.00") By Day 28, canopy expansion had accelerated enough that future structure management would increasingly depend on continued training and vertical space management.

MichaelTheBarnOwl Grow #5, Entry #5: Transition Post Flip, Early Flower Begins Days Since Emergence: 35 Days Since Flip: 12 Days in Flower: 3 Granddaddy Purple completed the transition period and entered early flower during this stage. Pistils became established across multiple nodes and flowering activity became consistent enough to transition nutrition fully into bloom-oriented feeding. Vertical growth remained aggressive as stretch continued following the flip. Light intensity increased steadily throughout the period in preparation for flower establishment while maintaining manageable canopy conditions. Measurements at the beginning of the period were recorded at 625 PPFD (27 DLI) for GDP1 and 650 PPFD (28 DLI) for GDP2. By Day 35, canopy measurements increased to 790 PPFD (34 DLI) for GDP1 and 860 PPFD (37 DLI) for GDP2. Dimmer output increased from 55–60% at the beginning of the period to 65% by the end of the period. UV supplementation increased from 45 minutes to 60 minutes per light cycle. Irrigation volume stabilized between 1–1.25 gallons per plant every other day. An attempt was made to extend irrigation frequency to once every three days; however, plants showed early signs of drought stress and watering returned to an every-other-day schedule. Input pH remained tightly controlled between 6.0–6.1 throughout the period. Nutrient strategy continued progressing alongside flower development. Plants entered the period receiving a 50/50 blend of Late Growth and Early Bloom at Medium concentration (900 PPM) and transitioned fully into Early Bloom at Medium strength (900 PPM) after pistils became established and plants officially entered flower. CAL-MAG remained unchanged at 5 mL/gal, while silica continued at 2 mL/gal every other watering. Structural management became increasingly important as stretch accelerated. Extensive low stress training continued throughout the canopy and selective defoliation focused primarily on leaves restricting airflow, contacting developing flower sites, and reducing congestion within the lower and middle canopy while minimizing removal from upper growth. Plant height increased rapidly through transition and into early flower. Plant Height - Flip Day vs. Day 1 of Flower (Flip + 10 Days): GDP1: 17.00" → 38.25" (+21.25") GDP2: 18.50" → 36.00" (+17.50") Plant Height - Day 35 Post-Emergence: GDP1: 38.25" GDP2: 40.00" Final canopy-to-light distance measured 14–15.75 inches. By the end of the period, available vertical space was becoming a primary consideration. The fixture had already been raised to its maximum position and remaining expansion options were becoming limited to equipment relocation if additional headroom became necessary. Aroma became noticeable immediately following visible flower initiation.

MichaelTheBarnOwl Grow #5, Entry #6: Early Flower Days Since Emergence: 42 Days Since Flip: 19 Days in Flower: 10 Granddaddy Purple progressed further into early flower during this period while continuing strong vertical expansion. Flower development became increasingly apparent across the canopy and structural management shifted further toward maintaining airflow, controlling height, and maximizing usable tent space. Light intensity continued increasing to support expanding flower sites while remaining within target ranges for early flower. Measurements at the beginning of the period were recorded at 790 PPFD (34 DLI) for GDP1 and 860 PPFD (37 DLI) for GDP2. By Day 42, canopy measurements stabilized at 860 PPFD (37 DLI) for both plants. Dimmer output increased from 65% at the beginning of the period to 70% by the end of the period. UV supplementation remained unchanged at 60 minutes per light cycle. Irrigation remained steady at 1–1.25 gallons per plant every other day throughout the period. Input pH remained tightly controlled between 6.0–6.2. Nutrient delivery stabilized during this stage with plants receiving Early Bloom at Medium strength (900 PPM) throughout the period. CAL-MAG remained unchanged at 5 mL/gal, while silica continued at 2 mL/gal every other watering. Structural management intensified as available vertical space narrowed. The exhaust system was relocated into the corner of the tent to recover additional headroom and preserve canopy distance. An AC Infinity trellis net was installed and tops were guided through the net to begin more active lateral control and height management. Defoliation continued with emphasis on removing foliage from the lower one-third of each plant along with inward-facing, overlapping, and light-blocking leaves within the lower and middle canopy. Removal remained conservative in the upper canopy to preserve productive flower sites and maintain canopy momentum. Plant Height - Day 42 Post-Emergence: GDP1: 48.50" GDP2: 47.00" Final canopy-to-light distance measured 12.0–14.0 inches. Aroma intensified noticeably during this period as flower development progressed. The tent environment developed a strong profile combining roadkill skunk characteristics with layered citrus and berry notes that became increasingly pronounced as flowers continued establishing. By the end of the period, height management had become one of the primary operational constraints of the grow. The fixture had reached its maximum practical height and future adjustments would increasingly depend on canopy management rather than additional fixture movement.

MichaelTheBarnOwl Grow #5, Entry #7: Early Flower, Stretch Ends Days Since Emergence: 49 Days Since Flip: 26 Days in Flower: 17 Although vertical growth had already begun slowing entering the week, measurements collected beyond Day 15 of flower showed no meaningful additional height gain and stretch was considered finished at that point. Management priorities shifted away from height control and toward optimizing light distribution, canopy structure, and directing energy into productive flower sites. Light intensity increased further during the period to support continued flower development while remaining within target ranges for early flower. Measurements at the beginning of the period were recorded at 860 PPFD (37 DLI) for both plants. By Day 49, canopy measurements increased to 960 PPFD (41 DLI) for GDP1 and 970 PPFD (42 DLI) for GDP2. Dimmer output remained unchanged at 70% throughout the period. UV supplementation increased from 60 minutes to 70 minutes per light cycle. Irrigation remained steady at 1–1.25 gallons per plant every other day with input pH maintained between 6.0–6.2. Nutrient delivery remained unchanged during this stage with plants receiving Early Bloom at Medium strength (900 PPM) throughout the period. CAL-MAG remained at 5 mL/gal, while silica continued at 2 mL/gal every other watering. Canopy management became increasingly selective as final plant structure emerged. Lower branch removal was guided primarily by available light, with nodes receiving less than 250 PPFD being removed if they could not be repositioned into productive canopy space. This resulted in the removal of eight branches during the period. Early assumptions about maintaining four branch sets per plant ultimately changed as the grow progressed. Internodal spacing and overall plant height resulted in lower branches falling too far below the productive canopy to develop into high-quality flower. By the end of stretch, practical structure had been reduced to the equivalent of 2–2.5 productive branch sets per plant, concentrating resources into better-positioned flower sites. Using final heights recorded at the time of flip and final heights at the end of stretch, final stretch multipliers were calculated as follows: Plant Height - Flip Day vs. End of Stretch: GDP1: 17.00" → 51.00" (3.00×) GDP2: 18.50" → 52.00" (2.81×) Final canopy-to-light distance measured 9.0 - 10.0 inches.

MichaelTheBarnOwl Grow #5, Entry #8: Mid Flower Days Since Emergence: 56 Days Since Flip: 33 Days in Flower: 24 With stretch complete, management efforts focused on maintaining light distribution, preserving airflow, and supporting continued flower development. Light intensity remained relatively stable throughout the period with only minor balancing adjustments across the canopy. Measurements at the beginning of the period were recorded at 960 PPFD (41 DLI) for GDP1 and 970 PPFD (42 DLI) for GDP2. By Day 56, canopy measurements measured 975 PPFD (42 DLI) for GDP1 and 945 PPFD (42 DLI) for GDP2. Dimmer output remained steady at 70%. UV supplementation increased from 70 minutes to 120 minutes per light cycle. Irrigation remained stable at 1–1.25 gallons per plant every other day with input pH maintained between 6.0–6.2. Nutrient delivery transitioned gradually through bloom progression while maintaining stable solution strength. Plants entered the period receiving Early Bloom at Medium strength (900 PPM) before progressing into a 50/50 blend of Early Bloom and Mid Bloom at Medium strength, ultimately finishing the period receiving Mid Bloom at Medium strength. Solution concentration remained unchanged at 900 PPM throughout the period. CAL-MAG remained unchanged at 5 mL/gal. Silica supplementation was reduced from 2 mL/gal every other watering to 1 mL/gal once per week. Canopy work became lighter and more selective compared to prior periods. Small amounts of defoliation continued with emphasis placed on removing leaves wrapping around developing flowers, inward-facing leaves, and foliage reducing airflow through the canopy. Additional adjustments were made to improve light distribution across the outer canopy, with efforts focused on positioning edge colas into a target range of 550–650 PPFD where possible. Plant Height - Day 56 Post-Emergence (unchanged since the end of stretch): GDP1: 51.00" GDP2: 52.00" Final canopy-to-light distance unchanged and measured 9.0–10.0 inches. Aroma intensified noticeably during this period as flowers continued developing and filling in. With major structural work complete, the canopy entered a more stable phase where the emphasis shifted toward maintaining conditions, preserving penetration through the canopy, and allowing flower sites to continue maturing with minimal intervention.

MichaelTheBarnOwl Grow #5, Entry #9: Mid Flower Days Since Emergence: 67 Days Since Flip: 44 Days in Flower: 35 Light intensity increased modestly during the period while maintaining stable conditions across the canopy. Measurements at the beginning of the period were recorded at 975 PPFD (42 DLI) for GDP1 and 945 PPFD (42 DLI) for GDP2. By Day 67, canopy measurements increased to 1060 PPFD (46 DLI) for GDP1 and 1050 PPFD (45 DLI) for GDP2. Dimmer output remained unchanged until Day 63 post-emergence, when output increased from 70% to 75%. UV supplementation increased from 120 minutes to 150 minutes per light cycle. Irrigation remained stable at 1–1.25 gallons per plant every other day with input pH maintained between 6.0–6.2. Nutrient delivery remained unchanged during this stage with plants continuing on Mid Bloom at Medium feed strength throughout the period. CAL-MAG remained at 5 mL/gal, while silica continued at 1 mL/gal once per week. Canopy intervention became minimal compared to prior periods. No additional defoliation was performed beyond selective removal of a small number of leaves contacting or wrapping around developing flowers. Structural work shifted toward observation and support as flower mass continued accumulating. Flower mass is clearly building. Stems began leaning under accumulating bud mass.

MichaelTheBarnOwl Grow #5, Entry #10: Mid Flower Days Since Emergence: 74 Days Since Flip: 51 Days in Flower: 42 Light intensity remained unchanged throughout the period. Measurements at the beginning of the week were recorded at 1060 PPFD (46 DLI) for GDP1 and 1050 PPFD (45 DLI) for GDP2 and remained unchanged through Day 74. Dimmer output remained fixed at 75%. UV supplementation remained unchanged at 150 minutes per light cycle. Irrigation remained stable at 1–1.25 gallons per plant every other day with input pH maintained between 6.0–6.2. Nutrient delivery remained unchanged during this stage with plants continuing on Mid Bloom at Medium feed strength throughout the period. CAL-MAG remained at 5 mL/gal, while silica remained at 1 mL/gal once per week. Canopy intervention remained minimal. Only small amounts of leaf removal were performed as needed to prevent friction against developing flowers and maintain airflow through the canopy. As flower mass continued accumulating, additional structural support became necessary. A secondary support screen was installed higher in the tent to assist branches that had begun leaning under increasing flower weight and branch length. Early Trichome Analysis - Tops: Clear: 35–40% Cloudy: 55–60% Amber: Trace A wind storm caused a power outage lasting roughly one hour during the light cycle. Airflow was temporarily lost and humidity increased sharply; however, inspection following restoration showed no visible condensation on foliage, tent walls, or other surfaces and environmental conditions returned to normal without issue. Aroma intensified further during this period with a strong berry and skunk profile becoming increasingly pronounced as flower development continued.

MichaelTheBarnOwl Grow #5, Entry #11: Mid-Late Flower Transition Days Since Emergence: 84 Days Since Flip: 61 Days in Flower: 52 Granddaddy Purple continued progressing through mid flower during this period while showing increasingly visible signs of maturity and early senescence. Environmental conditions began shifting gradually toward late flower targets, with reductions in both light intensity and UV exposure introduced in response to advancing flower development and trichome progression. Light intensity was reduced incrementally throughout the period in preparation for late flower. Measurements at the beginning of the period were recorded at 1050 PPFD (45 DLI) for GDP1 and 1060 PPFD (45 DLI) for GDP2. By Day 84, canopy measurements measured 925 PPFD (40 DLI) for GDP1 and 950 PPFD (42 DLI) for GDP2. Dimmer output decreased from 75% at the beginning of the period to 70% mid-period and 65% by the end of the period. UV supplementation was reduced from 150 minutes to 90 minutes per light cycle. Irrigation remained stable at 1-1.25 gallons per plant every other day with input pH maintained between 6.0–6.2. Nutrient delivery remained largely unchanged through most of the period with plants receiving Mid Bloom at Medium feed strength (900 PPM) before transitioning into a 50/50 blend of Mid Bloom and Late Bloom nutrients at Medium strength (800 PPM) by period end. CAL-MAG remained at 5 mL/gal, while silica remained at 1 mL/gal once per week. Trichome observations from upper flower sites continued supporting the transition toward late flower nutrition. Trichome Analysis - Tops: Clear: 15-20% Cloudy: 75-80% Amber: ~5% Additional support work continued during the period as smaller branches were secured to trellis wire and primary stems to reduce stress from increasing flower weight. Aroma continued evolving throughout the day. Evening observations produced a noticeably stronger skunk profile, while daytime aroma shifted toward a more berry-forward expression.

MichaelTheBarnOwl Grow #5, Entry #12: Late Flower Days Since Emergence: 91 Days Since Flip: 68 Days in Flower: 59 Light intensity was reduced incrementally throughout the week. Measurements at the beginning of the period were recorded at 925 PPFD (40 DLI) for GDP1 and 950 PPFD (42 DLI) for GDP2. By Day 91, canopy measurements measured 825 PPFD (35 DLI) for GDP1 and 850 PPFD (37 DLI) for GDP2. Dimmer output decreased from 65% to 60%. UV supplementation was reduced from 90 minutes to 45 minutes per light cycle. Irrigation remained stable at 1–1.25 gallons per plant every other day with input pH maintained between 6.0–6.2. Nutrient delivery transitioned fully toward late flower. Plants entered the period receiving a 50/50 blend of Mid Bloom and Late Bloom at Medium strength (800 PPM) before transitioning fully into Late Bloom at Medium strength (640 PPM). CAL-MAG decreased from 5 mL/gal to 3 mL/gal across the period. Silica supplementation was discontinued.

MichaelTheBarnOwl Grow #5, Entry #13: Ripening Days Since Emergence: 96 Days Since Flip: 73 Days in Flower: 64 Light intensity continued tapering through the period. Measurements at the beginning of the period were recorded at 825 PPFD (35 DLI) for GDP1 and 850 PPFD (37 DLI) for GDP2. By Day 96, canopy measurements measured 730 PPFD (32 DLI) for GDP1 and 725 PPFD (31 DLI) for GDP2. Dimmer output decreased from 60% to 55%. UV supplementation was reduced from 45 minutes to 30 minutes per light cycle. Irrigation remained stable at 1–1.25 gallons per plant every other day with input pH maintained between 6.0–6.2. Nutrient delivery transitioned from Late Bloom at Medium strength (640 PPM) into Ripening nutrients at Medium strength (440 PPM). CAL-MAG decreased from 3 mL/gal to 1 mL/gal across the period. Trichome observations continued showing strong progression toward maturity. Trichome Analysis - Top / Bottom Average: Clear: 15% Cloudy: 80% Amber: 5%

MichaelTheBarnOwl Grow #5, Entry #14: Ripening Days Since Emergence: 105 Days Since Flip: 82 Days in Flower: 73 Granddaddy Purple completed its lifecycle during this period and was harvested in its entirety following final maturation assessment. Light intensity remained unchanged through harvest with canopy measurements holding at 730 PPFD (32 DLI) for GDP1 and 725 PPFD (31 DLI) for GDP2. Dimmer output remained unchanged. UV supplementation was reduced fully from 45 minutes to 0 minutes. Irrigation remained stable with plants receiving plain pH-adjusted water only (115 PPM) throughout the final week. No flushing protocol was performed. Final trichome observations at harvest were recorded as follows: GDP1: Top: 8% clear / 88% cloudy / 4% amber Mid: 12% clear / 83% cloudy / 5% amber Bottom: 20% clear / 75% cloudy / 5% amber Overall: 13% clear / 82% cloudy / 5% amber GDP2: Top: 6% clear / 91% cloudy / 3% amber Mid: 12% clear / 85% cloudy / 3% amber Bottom: 22% clear / 73% cloudy / 5% amber Overall: 13% clear / 83% cloudy / 4% amber

MichaelTheBarnOwl Grow #5, Entry #15: Harvest and Cure Days Since Emergence: 105 Days Since Flip: 82 Days in Flower: 73 Final trichome observations at harvest were recorded as follows: GDP1: Top: 8% clear / 88% cloudy / 4% amber Mid: 12% clear / 83% cloudy / 5% amber Bottom: 20% clear / 75% cloudy / 5% amber Overall: 13% clear / 82% cloudy / 5% amber GDP2: Top: 6% clear / 91% cloudy / 3% amber Mid: 12% clear / 85% cloudy / 3% amber Bottom: 22% clear / 73% cloudy / 5% amber Overall: 13% clear / 83% cloudy / 4% amber Harvest was performed methodically from the bottom up to maintain structural stability. Branches were removed individually, lightly rough trimmed, and buds reduced to manageable size prior to drying. Flowers were processed in a Cannatrol using a 4-day dry, 4-day cure, and 4-day hold before being transferred to Grove bags with 62% two-way humidity packs for 3 weeks and later moved into mason jars for long-term storage. Final Dry Weight: 351.6 grams Lifecycle Summary - Granddaddy Purple: Emergence: 2 days from seed Seedling Stage: 9 days Vegetative Stage: 13 days Topped: Day 19 post-emergence Flip to Flower: Day 24 post-emergence Transition Period: 8 days post-flip Flowering Stage: 73 days Total Time (Seed to Harvest): 105 days