Grow Diary Granddaddy Purple

Granddaddy Purple – Week #7 of Flower (Mid to Late Flower Transition)

Week seven of flower marked a clear shift in Granddaddy Purple toward late-stage development, with continued bud swelling and increasing resin production across the canopy. Structural support added in earlier weeks continued to hold large spires steady as flower weight increased, requiring only minor adjustments to maintain stability.

Calyxes thickened noticeably throughout the week, particularly along the upper colas, while pistils began to show early signs of maturity with some darkening and recession. Feeding began the week with mid-flower nutrients at approximately 880 ppm and gradually transitioned toward a blended mid- and late-flower regimen, finishing the week near 800 ppm. Nutrient uptake remained consistent, and the plants showed no signs of stress, deficiency, or excess.

Light intensity was eased back slightly to better match this stage of flower. Canopy PPFD was reduced from roughly 1050 at the start of the week to about 950 by the end, bringing DLI down from approximately 45 to around 40. These adjustments were made gradually to support maturation while protecting resin quality. UVA exposure was decreased from 2.5 hours to 2 hours.

Trichome development advanced steadily. Examination of the upper colas on Day 52 of flower showed an estimated distribution of 15% clear, 80% cloudy, and 5% amber, indicating that Granddaddy Purple is entering the early phase of late flower but still has meaningful time remaining before ripening.

Trichome coverage is dense and well-formed across calyxes and sugar leaves, producing a noticeably tacky resin layer.

Early signs of natural senescence began appearing on select upper fan leaves, consistent with nutrient reallocation at this stage of development. This progression appears localized and expected, with overall plant health remaining strong.

Aromatically, Granddaddy Purple continues to express deep grape and dark berry notes, layered over a persistent skunk undertone (from neighboring God's Gift). By the end of week seven, the plant is transitioning cleanly into late flower, with environmental and nutrient strategies now focused on controlled maturation and preserving resin and terpene quality heading into the final weeks.