Ultimate Chem by Unknown or Legendary
Ultimate Chem is an indica-leaning cannabis strain from Unknown or Legendary, bred by crossing Chem 91 Skunk VA × Sour Diesel. The environment targets below are the same stage-by-stage bands the Cultivar journal grades real Ultimate Chem grows against.
🌿 Start a Ultimate Chem journal — free →
Similar strains
| Breeder | Unknown or Legendary |
|---|---|
| Type | mostly indica |
| Environment | Indoors, Outdoors |
| Lineage | Chem 91 Skunk VA × Sour Diesel |
| Descendants | Towering Inferno, Toxic Green, Ultimate Chem 08, Stardawg UCBW |
🌱 Get Ultimate Chem seeds →
Affiliate link — supports Cultivar at no cost to you.
🧬 Explore the family: Chem 91 Skunk VA · Sour Diesel · Towering Inferno · Toxic Green · Ultimate Chem 08 · Stardawg UCBW
Ancestry Pedigree
Clone Only Strains
Unknown or Legendary
Original Strains
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Sensi Seeds
Sensi Seeds
The Seed Bank
Cultivators Choice
Original Strains
Original Strains
Original Strains
Original Strains
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Unknown or Legendary
Cultivators Choice
Unknown or Legendary
Growing Ultimate Chem: what to expect
As an indica-leaning plant, expect a modest stretch after the flip (roughly 50–100%) and dense bud structure — which makes late-flower humidity discipline the main risk: keep RH in the 40s once buds fatten to stay ahead of mold. Growers familiar with Chem 91 Skunk VA or Sour Diesel will recognize much of its behavior. Whatever the listing says, the cut in YOUR tent is the ground truth: log feedings, readings, and photos, and let the trends — not the label — drive decisions.
Ultimate Chem FAQ
Is Ultimate Chem an indica or a sativa?
Ultimate Chem is listed as mostly indica.
What are the parents of Ultimate Chem?
Ultimate Chem was bred from Chem 91 Skunk VA × Sour Diesel by Unknown or Legendary.
What environment does Ultimate Chem like?
Standard cannabis bands work well: VPD 0.8–1.1 kPa in veg and 1.0–1.4 kPa in flower, with humidity stepping down from 65–75% as a seedling to 40–50% in late flower. See the stage-by-stage table on this page.
📷 Growing Ultimate Chem and something looks off? Free AI photo diagnosis →
Facts compiled from public breeder listings. Growing Ultimate Chem? A structured journal — with your feedings, readings, and photos — is how you find what THIS cut actually wants.
Track your own grow free — the journal grades your environment against these bands →
Get the one-page grow reference card
VPD, pH by medium, deficiency symptoms and dry/cure targets on a single printable page. Free — plus the occasional grow-data breakdown. No spam, unsubscribe in one click.