Harlequin Seeds
High-CBD Relief With a Colombian Gold Pedigree
Harlequin seeds offer one of the most consistent CBD-to-THC ratios available in seed form, with CBD levels ranging from 6-15% against a ceiling of just 7% THC. That balance, rooted in Colombian Gold and Thai genetics, produces a clear-headed, functional effect profile that very few hybrids can replicate. If you're sourcing seeds specifically for high-CBD output, Harlequin feminized seeds and Harlequin autoflower seeds are among the most established options on the market.
Harlequin Feminized vs. Autoflower Seeds
| Seed Type | Flowering Time | Yield | Best For |
|---|---|---|---|
| Feminized | 7-9 weeks | 400-500g/m² indoors; 500-600g/plant outdoors | Growers maximizing CBD yield per plant with light control |
| Autoflower | 8-10 weeks from seed | 350-450g/m² indoors; 150-250g/plant outdoors | Faster harvests, discreet grows, or first-time Harlequin runs |
Harlequin feminized seeds are the stronger choice if maximizing CBD content is the primary goal. The longer vegetative window gives plants more time to express the full genetic range of that 6-15% CBD output, and outdoor plants regularly hit 500-600g per plant when given space. The Colombian Gold and Thai lineage responds well to extended growing seasons, so photoperiod growers in warm climates have a real yield advantage here.
The autoflower version, exclusively available through Crop King Seeds, trades some per-plant yield for speed and simplicity. At 8-10 weeks from seed, it suits growers who want to run multiple Harlequin harvests per year indoors or who need a compact plant footprint. CBD ratios can vary slightly more in autoflower phenotypes, so buyers sourcing for medical consistency should factor that in when choosing between formats.
Where to Buy Harlequin Seeds
Compare prices from verified seedbanks
| Seedbank | Score | Seed Types | Price | |
|---|---|---|---|---|
| Seed City | Feminized | From $4.41/seed | View at Seed City → | |
| Crop King Seeds | 7.2/10 | Autoflower | From $7.00/seed | View at Crop King Seeds → |
| Sensi Seeds | 6.6/10 | Feminized | From $7.29/seed | View at Sensi Seeds → |
| MSNL | Feminized | From $14.17/seed | View at MSNL → | |
| Herbies Seeds | Feminized | From $15.99/seed | View at Herbies Seeds → | |
| ILGM | 7.4/10 | Feminized | From $16.80/seed | View at ILGM → |
Also available at: Seedsman
Links go directly to seedbank product pages.
Harlequin Seed Specs
| Strain Type | Hybrid |
| Lineage | Colombian Gold x Thai |
| THC Content | Up to 7% |
| CBD Content | 6-15% |
| Flowering Time | 7-9 weeks (feminized/photoperiod) |
| Indoor Yield | 400-500g/m² |
| Outdoor Yield | 500-600g/plant |
| Growing Difficulty | Moderate |
| Available Formats | Feminized, Autoflower |
Harlequin Seeds: Frequently Asked Questions
What's the difference between Harlequin Feminized and Autoflower seeds?
The feminized version flowers in 7-9 weeks under a photoperiod trigger and produces up to 500-600g per plant outdoors, giving it a significant yield advantage for CBD production. The autoflower version completes its cycle in 8-10 weeks from seed regardless of light schedule and is only available through Crop King Seeds (scored 7.2/10). If your priority is maximizing CBD output per harvest, feminized is the stronger format. If you need faster turnaround or are running an indoor setup without light schedule flexibility, the Crop King autoflower is the only seed-available option in that format for this strain.
What THC level can I expect from Harlequin seeds?
Harlequin seeds produce plants with THC levels up to 7%, which is intentionally low relative to its CBD content. This is one of the defining characteristics of the strain's Colombian Gold and Thai lineage: the genetic architecture consistently suppresses THC expression while allowing CBD to dominate. Buyers looking for a high-THC hybrid should look elsewhere. Harlequin's value is specifically in that sub-7% THC ceiling paired with CBD that can reach 15%.
How much CBD does Harlequin contain?
Harlequin seeds produce plants testing between 6-15% CBD, which is a wide range that reflects genuine phenotype variation across the strain. The upper end of 15% CBD is achievable but not guaranteed in every plant, and CBD expression can vary between the feminized and autoflower formats. Medical buyers who need consistent CBD ratios above 10% should request third-party lab certificates from their seedbank before ordering. ILGM, which scores 7.4/10 for this strain, is the most transparent of the seven carrying seedbanks when it comes to batch documentation.
Where can I buy Harlequin seeds online?
Harlequin seeds are available from seven seedbanks: Seedsman, ILGM, Crop King Seeds, Herbies Seeds, MSNL, Sensi Seeds, and Seed City. For feminized seeds, ILGM (7.4/10) offers the strongest germination guarantee relative to Harlequin's moderate difficulty level. For autoflower seeds, Crop King Seeds (7.2/10) is the only available source. Sensi Seeds carries feminized stock but scores 6.6/10 specifically for Harlequin, suggesting more phenotype variability in their batches than buyers might expect from that seedbank. Comparing pack sizes and per-seed pricing across Seedsman, Herbies, and MSNL is worth doing before committing, as all three carry the feminized format at potentially different price points.
