Chem D x Purple Urkle 103 sits between Chem D and Purple Urkle: the Chem family's workhorse and the cut most breeders reach for first on one side, a Mendocino Purps selection pulled out of the Emerald Triangle around 1990 on the other. What CSI sell is access to their clone collection in seed form. The parents are the cuts themselves, not a line bred to resemble them.

The number in Chem D x Purple Urkle 103 is a specific plant, not a decoration. Humboldt CSI grow a population out, keep the individuals worth keeping and number them, so Chem D x Purple Urkle 103 is one identified selection rather than Chem D x Purple Urkle in general. A pack naming a different number is a different mother.

Chem D sits on the seed side here, Purple Urkle on the pollen side. If you have seen these two names paired the other way round, that is a different pack and not this one.

Genetic Lineage

• Mother: Chem D. The most-used of the 1991 Chem phenotypes, and the one sitting behind Giesel. Parentage: another phenotype from the same 1991 seed lot. It is the Chem half of Giesel, and one of the most widely used Chem cuts in American breeding.
• Father: Purple Urkle. The Emerald Triangle purple keeper that most of California's colour reputation rests on. Dense purple flower in a closed canopy is where mould starts.
• Why these two. They are not variations on the same idea. They pull in different directions, and that spread is what makes a pack worth hunting through rather than just growing.

Flavor and Aroma Profile

Two profiles that stay distinguishable rather than collapsing into one.

• The Aroma. Chemical fuel over dark turned earth from the Chem D side, against grape and berry with a musky, skunky floor under it from the Purple Urkle side.
• The Taste. Fuel and earth, greasy and coating, finishing sour up front, turning to grape and berry turning earthy and musky through the exhale.

The two halves, side by side

• Timing. Purple Urkle runs around eight weeks indoors, inside a seven to nine week window, and that is the half of this cross you can actually plan around.
• The smell is a negotiation. Chemical fuel over dark turned earth on one side against sweet grape and dark berry over earthy skunk, myrcene-dominant on the other. Neither wins outright in every seedling.
• Build. On the Chem D side: open and loose rather than compact, wants support once the colas load. On the Purple Urkle side: compact and indica-built; deep purple colour hardest where night temperatures drop late. Select early rather than trying to train your way out of it.
• Opposite ends. Chem D is reported as alert and head-forward rather than heavy; Purple Urkle as settled and unhurried; the heavy, physical end. The cross sits somewhere between and moves plant to plant.

Cultivation and Growth Traits

• Plant Structure. The two parents disagree here, so plan for range. Chem D is open and loose rather than compact, wants support once the colas load. Purple Urkle is compact and indica-built; deep purple colour hardest where night temperatures drop late.
• Vegetative Phase and Stretch. Shape the plant before the flip. Correcting a frame in week six is harder work than setting it in week two.
• Flowering Time. Purple Urkle runs around eight weeks indoors, inside a seven to nine week window. Start checking trichomes a week before you expect to be ready.

Effects and Experience

• The Mind. Growers describe Chem D as alert and head-forward rather than heavy.
• The Body. Purple Urkle is reported as settled and unhurried; the heavy, physical end, and that is the side supplying the weight here.

In the pack

Feminized seeds from Humboldt CSI. Humboldt CSI are preservationists before they are breeders - most of what they release is a clone somebody has kept alive by hand for years, put into seed so it stops depending on one grower staying in the game. That is what you are buying into here. Genuine Humboldt CSI stock.