Granddaddy Purple Auto - Week by Week Grow Diary & Strain Review

Darth_Vaper ran this Granddaddy Purple Auto in a tight indoor space, dealing with real heat and real constraints. No climate-controlled room, no oversized tent.

Just one auto in hydro, behind a cabinet, with adjustments made as conditions demanded. What stands out isn’t technique-heavy growing, but how forgiving this plant proved to be when things didn’t go perfectly.

Grow Setup

Grow Diary

Germination

The seed was started in rapid rooters on a heat mat and came up without hesitation. Early growth stayed under a low-watt custom LED.

Heat was already part of the conversation at this point, so light placement and intensity were handled cautiously right from the start.

Weeks 4 & 5

By week four, the plant was settled into the hydro system and clearly comfortable there. The heat never really let up, often pushing into the 30 °C range, so the lower-watt LED stayed in play longer than planned. 

Feeding with the General Hydroponics Flora Series stayed steady, with close attention paid to how quickly the plant was drinking.

Flowering kicked off in week five. The light schedule held at sixteen hours, and some stretch showed up, likely from keeping the light higher than ideal to manage temperatures.

A bit of light LST was introduced, nothing aggressive, just enough to open things up without rattling the auto.

Weeks 6 & 7

Flower development rolled forward through weeks six and seven without drama. The light schedule stretched to eighteen hours, and nutrient demand climbed.

Red stems appeared, raising the usual question of genetics versus mild stress, but the plant never lost momentum.

By week seven, it was clearly committed to flower. Buds thickened, and the grower stayed focused on solution changes and consistency instead of chasing perfection.

Weeks 8 & 9

This was the rough patch. Daytime temperatures climbed into the mid-30 °C, and at one point the reservoir ran dry by accident. The plant showed it immediately. The fix came fast, and just as quickly, the plant bounced back.

As flowering pushed on, weight started showing. Branches leaned. Support became necessary. Nights cooled down sharply compared to the daytime heat, but the plant handled the swing without complaint.

Early hints of color started to creep in as maturity set in.

Weeks 10 & 11

By week ten, the finish line was close enough to feel. Buds had real density now, pistils darkened and curled, and the plant stopped pretending it had much left to build.

Feeding stayed consistent, with harvest clearly a week or two out.

Week eleven slowed everything down. New growth stalled, and flushing with plain water began. The structure was set. The plant was just finishing on its own terms.

Week 13 — Harvest

Harvest landed in week thirteen. The plant came down with roughly 3 oz wet and about 2.8 oz of dry, usable flower, plus additional trim kept aside. 

Curing was done in small mylar bags with humidity packs, and the results cleaned up quickly, smooth and well-finished after a short cure.

Detailed Observations & Grower’s Reflections

Granddaddy Purple Auto carried this grow. Heat spikes, a dry reservoir scare, minimal training, and a cramped space would have punished a more sensitive plant. This one stayed cooperative.

It didn’t ask for perfect conditions. It just needed problems fixed before they stacked up.

Challenges & Solutions

Heat dictated almost every decision. Lighting choices, timing, and restraint all came back to temperature control. The reservoir mistake was caught quickly and didn’t leave a mark.

Keeping training light and feeding consistent did more for this grow than any single tweak.

Granddaddy Purple Auto: Final Result and Strain Review

The final dry yield of roughly 2.8 oz per plant earned the run a 10/10 from the grower. Effects leaned euphoric and giggly before settling into a relaxed, easy finish.

Flavor came through with diesel, fruit, and pine notes. Simple, satisfying, and forgiving.

Ready to get these results? Buy Granddaddy Purple Auto Seeds Here