4C Labs Craft ZG T21
This is the name on the prescription.How to read this nameStrainZero Gravity
4C Labs Craft ZG T21 is a medical cannabis flower from 4C Labs, available in the UK on prescription only. Its strain is Zero Gravity (hybrid). Its label gives THC 18.9 to 23.1% and CBD <1%. Its list price is £8.50 a gram; pharmacies set their own prices.
Recommended price
£8.50/g
Zero Gravity
4C Labs
What this product is called
- Brand
- 4C Labs
- Strain name
- Zero Gravity
- Medical product name
- Craft ZG T21
The strain name is what most people call it. The medical product name is what appears on the prescription and the pharmacy label.
Zero Gravity by 4C Labs, a beta-irradiated medical cannabis flower with 21% THC and <1% CBD. Cultivated in Canada, packaged in United Kingdom. RRP: £8.50/g.
Cannabinoids
Percentage of the dried flower by weight, shown as the range listed for the product
- THC
- 18.9 to 23.1%
- CBD
- <1%
Chemotype: Type I: High THC What is a chemotype?
Terpenes What are these?
The aromatic compounds listed for this product. Amounts are not published, only which are major and minor.
Major
Limonene
Citrus/Sour
Caryophyllene
Spice/Gas
Minor
Myrcene
Herbal/Musk
Ocimene
Herbal/Sweet
Humulene
Earthy/Spice
Linalool
Floral/Lavender
Alpha-Pinene
Pine/Sharp
Alpha-Farnesene
Spice/Mace
Strain info
- Strain
- Zero Gravity
- Classification
- HybridWhat this means
- Parent strains
- (Holy Grail Kush (Indica Hybrid) x Smurfzilla (Hybrid)) x Mai Thai (Hybrid)
Product facts
- Form
- Trimmed Whole Flower
- Irradiation
- Beta-Irradiated
- Grown in
- Canada
- Packaged in
- United Kingdom
- Import status
- Schedule I: Raw Material
Supply chain What the roles mean
The companies named for this product, from grower to pharmacy
- 4C Labs
Brand
Sold under this name
- Krft
Cultivator
Grew it
- Xeal Pharma
Importer
Brought it into the UK
- Xeal
Packager
Packed it
- 4C Labs
Distributor
Supplies pharmacies
Pack sizes and prices
Listed prices as of March 2026. Pharmacies set their own prices, so check before you order.
| Pack size | Price | Per gram |
|---|---|---|
| 10g | £85.00 | £8.50 |
| 30g | £255.00 | £8.50 |
How much is in one gram
One gram of this flower contains about 189 to 231mg of THC and up to 10mg of CBD.
Worked out from the strength on the label. This is arithmetic, not dosing advice: follow the dose your prescriber gave you.
What patients paid
No one has reported a price for this product yet.
Bought this recently? Tell other patients what you paidSimilar products
If 4C Labs Craft ZG T21 is out of stock, these are the closest on type, strength and terpenes. That is a comparison of what is on the label, not advice. Only your prescriber can decide whether a different product is right for you, and changing product needs a new prescription.
- Clearleaf® GED T21
Gelato Dream
THC 18.9-23.1% · CBD <1%
- Similar THC
- Shares limonene, caryophyllene
- Also hybrid
No recent stock reports
Check stock - Clearleaf® GOZ T21
Gorilla Zkittlez
THC 18.9-23.1% · CBD <1%
- Similar THC
- Shares limonene, caryophyllene
- Also hybrid
No recent stock reports
Check stock No recent stock reports
Check stock- Upstate® SBK T21
Sky Berry Kush
THC 18.9-23.1% · CBD <1%
- Similar THC
- Shares limonene, caryophyllene
- Also hybrid
No recent stock reports
Check stock - Together Pharmacy Cassiopeia T20
Ninja
THC 18.81-22.99% · CBD <1%
- Similar THC
- Shares limonene, caryophyllene
- Also hybrid
No recent stock reports
Check stock - Curaleaf® ACM T22
Allium Chem
THC 19.8-24.2% · CBD <1%
- Similar THC
- Shares limonene, caryophyllene
- Also hybrid
Reviews
Pricing
per gram, recommended retail price
Discontinued
National availability, may be out of date