There are two very different things inside Birthday Cake x Purple Indica. Birthday Cake: Girl Scout Cookies crossed to Cherry Pie, and one of the cleanest dessert profiles anyone made. And Purple Indica, an heirloom of Pacific Northwest fame going back to the early-to-mid 1980s. 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.
Order matters in a cross name. In Birthday Cake x Purple Indica the Birthday Cake side supplied the seed and Purple Indica the pollen, and the reciprocal - the same two plants the other way round - is a separate breeding decision with its own results.
Genetic Lineage
- Mother: Birthday Cake. Girl Scout Cookies crossed to Cherry Pie, and one of the cleanest dessert profiles anyone made. Built from Girl Scout Cookies x Cherry Pie.
- Father: Purple Indica. An heirloom of Pacific Northwest fame going back to the early-to-mid 1980s. The purple is in the plant rather than in the weather - the leaves come in dark without needing a cold snap to bring the colour out, which is not true of most purple lines.
- What to expect across a pack. Two distinct parents means real variation in frame, finish and nose. Select early and take cuttings off anything you would want again.
Flavor and Aroma Profile
The nose is where these two argue hardest.
- The Aroma. Sweet vanilla that genuinely does read as cake, turning slightly skunky when the buds are broken open from the Birthday Cake side, against sweet and earthy with pine and berry from the Purple Indica side.
- The Taste. Sweet vanilla on the inhale with a skunky edge behind it up front, turning to floral, dark Concord grape through the exhale.
What each side brings
- What to budget. The documented side, Purple Indica, runs fifty-six to sixty-three days. Set the room to that and let the plants correct you.
- Two noses, one pack. Birthday Cake contributes sweet vanilla that genuinely does read as cake, turning slightly skunky when the buds are broken open. Purple Indica contributes sweet and earthy with pine and berry. Which dominates is the main thing that varies.
- Two frames in one pack. Birthday Cake is indica-leaning with heavy resin production. Purple Indica is indica by build, indoors or outdoors; naturally dark purple leaves rather than colour that only arrives in the cold. Decide which suits your room before you flip, because you get both.
- Opposite ends. Birthday Cake is reported as indica-dominant and physically relaxing; Purple Indica as settled and unhurried; physical and relaxing. 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. Birthday Cake is indica-leaning with heavy resin production. Purple Indica is indica by build, indoors or outdoors; naturally dark purple leaves rather than colour that only arrives in the cold.
- Training. Worth the effort early - it is the difference between an even canopy and three colas and a lot of leaf.
- Flowering Time. Purple Indica runs fifty-six to sixty-three days. Start checking trichomes a week before you expect to be ready.
Effects and Experience
- The Mind. Growers describe Birthday Cake as indica-dominant and physically relaxing.
- The Body. Purple Indica is reported as settled and unhurried; physical and relaxing, and that is the side supplying the weight here.
In the pack
Feminized seeds from Humboldt CSI. CSI work from clone stock they have kept for years and reverse it into seed, so what arrives in a pack is the real cut's genetics rather than a seed-line approximation of it. Original Humboldt CSI stock.
Birthday Cake x Purple Indica – Humboldt CSI
- Brands CSI Humboldt
- Product Code: 0000000018
- Availability: Out Of Stock
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$100.00
Tags: cannabis seeds, feminized seeds, Humboldt CSI, CSI Humboldt, Birthday Cake, Purple Indica, strain guide

