Curaleaf® HSR T21
This is the name on the prescription.How to read this nameStrainHigh Silver
Curaleaf® HSR T21 is a medical cannabis flower from Curaleaf®, available in the UK on prescription only. Its strain is High Silver (sativa hybrid). Its label gives THC 18.9 to 23.1% and CBD <1%. Its list price is £5.90 a gram; pharmacies set their own prices.
Recommended price
£5.90/g
High Silver
Curaleaf®
What this product is called
- Brand
- Curaleaf®
- Strain name
- High Silver
- Medical product name
- HSR T21
The strain name is what most people call it. The medical product name is what appears on the prescription and the pharmacy label.
High Silver by Curaleaf®, a beta-irradiated medical cannabis flower with 21% THC and <1% CBD. Cultivated in Portugal, packaged in United Kingdom. RRP: £5.90/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
Myrcene
Herbal/Musk
Ocimene
Herbal/Sweet
Humulene
Earthy/Spice
Terpinolene
Floral/Herbal
Caryophyllene
Spice/Gas
Strain info
- Strain
- High Silver
- Classification
- Sativa HybridWhat this means
- Parent strains
- Haze (Sativa) x (Skunk #1 (Hybrid ) x Northern Lights #5 (Indica Hybrid))
Product facts
- Form
- Trimmed Whole Flower
- Irradiation
- Beta-Irradiated
- Grown in
- Portugal
- 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
- Curaleaf®
Brand
Sold under this name
- Terra Verde
Cultivator
Grew it
- Curaleaf® Laboratories
Importer
Brought it into the UK
- Curaleaf® Laboratories
Packager
Packed it
- Curaleaf® Laboratories
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 | £50.00 | £5.00 |
| 30g | £150.00 | £5.00 |
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 Curaleaf® HSR 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.
- Find HSR Smalls T17-20
High Silver
THC 15.3-22% · CBD <1%
- Same strain, different producer
- Shares myrcene, ocimene, humulene
- Also sativa hybrid
No recent stock reports
Check stock - Upstate® SBK T21
Sky Berry Kush
THC 18.9-23.1% · CBD <1%
- Similar THC
- Shares myrcene, humulene, caryophyllene
No recent stock reports
Check stock - Together Pharmacy Cassiopeia T20
Ninja
THC 18.81-22.99% · CBD <1%
- Similar THC
- Shares myrcene, humulene, caryophyllene
No recent stock reports
Check stock - Green Organic Dutchman™ Organic T21
Cherry Mints
THC 18.9-23.1% · CBD <1%
- Similar THC
- Shares myrcene, caryophyllene
- Also sativa hybrid
No recent stock reports
Check stock - Noidecs T21
Gorilla Glue #4
THC 18.9-23.1% · CBD <1%
- Similar THC
- Shares myrcene, caryophyllene
- Also sativa hybrid
No recent stock reports
Check stock - Noidecs GG T21
Gorilla Glue #4
THC 18.9-23.1% · CBD <1%
- Similar THC
- Shares myrcene, caryophyllene
- Also sativa hybrid
No recent stock reports
Check stock
Reviews
Pricing
per gram, recommended retail price
In Stock
National availability, may be out of date