Chemdog 91 1-21 x Purple Urkle 103 sits between Chem 91 and Purple Urkle: the SKVA cut, the original Chemdog '91 and the clone the whole Chem family is named after on one side, a Mendocino Purps selection pulled out of the Emerald Triangle around 1990 on the other. These are held cuts, not recreations. CSI's entire catalogue works that way, and it is the reason their crosses are worth chasing.

Chemdog carries a 91 because selections get numbered to stay distinguishable once they leave the room they were made in. It marks this exact mother, and it is the part of the name worth reading closely. The number in 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 x Purple Urkle 103 is one identified selection rather than x Purple Urkle in general. A pack naming a different number is a different mother.

Written this way, Chem 91 is the mother and Purple Urkle the pollen donor. Reversing a cross is not a formality; which plant carries the seed shapes what comes out of the pack.

Genetic Lineage

• Mother: Chem 91. The SKVA cut, the original Chemdog '91 and the clone the whole Chem family is named after. It traces back to one of thirteen seeds from a bag bought at a Grateful Dead show in 1991. Skunk VA was given a cut in 1995 and has held it since, which is why the line survives.
• 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.
• What the cross is reaching for. One side brings the structure and the other brings the nose. The plants worth keeping out of a pack are the ones that hold both rather than picking a side.

Flavor and Aroma Profile

Two profiles that stay distinguishable rather than collapsing into one.

• The Aroma. Pungent turned earth and diesel with pine and citrus sitting behind from the Chem 91 side, against sweet grape and dark berry over earthy skunk, myrcene-dominant from the Purple Urkle side.
• The Taste. Greasy and mouth-coating, fuel then earth and pine, finishing sour up front, turning to dark fruit up front, musk and earth behind it through the exhale.

How the two sides differ

• Two different harvest dates. Sixty-three to seventy days for Chem 91, around eight weeks indoors, inside a seven to nine week window for Purple Urkle. Judge each plant on trichomes rather than pulling the room together.
• Two noses, one pack. Chem 91 contributes pungent turned earth and diesel with pine and citrus behind it. Purple Urkle contributes sweet grape and dark berry over earthy skunk, myrcene-dominant. Which dominates is the main thing that varies.
• Build. On the Chem 91 side: loose and open rather than compact, moderate to heavy stretch, branches that soften under weight late. 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.
• They pull differently. Growers put Chem 91 at alert and head-forward, sativa-leaning rather than heavy and Purple Urkle at settled and unhurried; the heavy, physical end. Which end a plant lands on is the main variable.

Cultivation and Growth Traits

• Plant Structure. The two parents disagree here, so plan for range. Chem 91 is open and loose rather than tight, stretching moderately to heavily, with branches that soften under weight late in flower. Purple Urkle is compact and indica-built; deep purple colour hardest where night temperatures drop late.
• Training. Worth the effort early - it is the difference between an even canopy and three colas and a lot of leaf.
• Flowering Time. The parents are not on the same clock. Chem 91 runs sixty-three to seventy days, Purple Urkle around eight weeks indoors, inside a seven to nine week window. Judge each plant on trichomes rather than pulling the room together.

Effects and Experience

• The Mind. Growers describe Chem 91 as alert and head-forward, sativa-leaning 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. What they sell is preservation work: old clones reversed into seed so the line survives past whoever is currently keeping it alive. Sold as authentic Humboldt CSI.