5 Strains Listed by The Clone Conservatory That Have Tested HLVD Positive

Blackberry Kush is a classic indica with a reputation built on potency, dense trichome coverage, and a berry-forward kush aroma. It is the kind of strain that gets held as a long-term mother plant — prized for consistency in both yield and effect. That long-term mother status is precisely where HLVD risk compounds. Plants kept for extended periods undergo repeated cutting stress and accumulate viroid load over time without obvious external symptoms, particularly in early and mid-cycle stages.

The HLVD-positive version of this cut showed what growers familiar with the strain described as a shadow of its normal self. The trichome coverage that defines Blackberry Kush at its best was noticeably reduced, and the berry-kush aromatic profile — normally one of the strongest identifiers of the strain — came in flat and muted at harvest. Dense bud structure became airy and undersized. For a strain known specifically for heavy resin and pronounced aroma, these are significant and unmistakable losses tied directly to viroid expression.

Candy Gelato — sometimes listed as Cotton Candy Gelato — is a hybrid that trades specifically on its dessert terpene profile and visual appeal. Sweet, candy-like aromatics and bag presence that reflects the Gelato lineage are the selling points growers pay for with this cut. HLVD attacks both of those qualities directly. Terpene suppression and reduced resin production are among the most consistent and damaging effects of viroid infection, and a strain whose entire value proposition rests on those exact traits is uniquely vulnerable.

Growers working with the confirmed HLVD-positive version of Candy Gelato reported aroma that landed somewhere between grassy and faintly sweet — nothing close to the pronounced candy profile that gives the strain its name. Frost coverage was noticeably lower than expected, reducing bag appeal significantly. In a market where Gelato-lineage strains are sold partly on visual impression and jar presentation, this represents a direct commercial loss on top of reduced extract potential.

Candy Crusher is a heavy indica built around sweet flavor and lasting body effects. It appeals to growers running nighttime-oriented, relaxation-focused cultivars — a category that often attracts medical users seeking consistent, potent, predictable output. The issue with HLVD in a strain like this is that the very qualities patients and consumers rely on — potency, terpene intensity, and effect consistency — are precisely what the viroid degrades over successive infected growth cycles.

The confirmed positive result on Candy Crusher came alongside observations of progressively weakening plant vigor across multiple cycles from the same infected mother. What started as slightly below-average performance gradually deteriorated into significantly reduced yield, weakened body effect profile, and sweetness that faded to something generic and indistinct. This pattern of progressive decline from an infected mother is one of the clearest signatures of HLVD accumulation — early infected cycles may seem acceptable, and growers continue running the clone until the losses become impossible to ignore.

Oreo Blizzard sits in the modern dessert-indica category — a strain built on visual impact, cream-and-cookie terpene expression, and deeply relaxing indica effects. This type of cultivar has become a staple of the premium clone market in recent years, and its commercial appeal has pushed it through nurseries, online clone vendors, and private collections across multiple states. The broader a strain's distribution network, the higher the probability that a contaminated copy is somewhere in that chain.

The HLVD-positive cut of Oreo Blizzard exhibited particularly notable structural degradation at flower. Buds that should have carried the dense, visually striking appearance the strain is known for came in loose, small-calyxed, and lacking the characteristic trichome blanket that makes it marketable. The creamy, dessert-leaning terpene profile was largely absent — replaced by a flat, unremarkable aroma that would be difficult to move in any quality-focused market. Potency testing on infected material came in well below what healthy versions of this cultivar produce.

Double Runtz carries the Runtz lineage — one of the most commercially successful and heavily distributed strain families in the modern cannabis industry. Runtz genetics have moved through more hands, more nurseries, and more commercial facilities than almost any other strain family in recent memory. That saturation is both a testament to the genetics' quality and a significant contamination-risk factor. Strains that pass through this many supply chains over this many years accumulate HLVD exposure at a scale that is difficult to overstate.

The confirmed HLVD-positive result on Double Runtz is particularly concerning because Runtz genetics are known for explosive, fruit-forward terpene production — the candy and tropical aromas that define the family are what growers are paying premium prices for. Infected plants delivered on almost none of that. Terpene output was dramatically reduced, leaving behind a faint, underdeveloped scent profile. Resin coverage was thin, density was low, and clones taken from the infected mother showed inconsistent and sluggish rooting. For a strain where the terpene profile is the entire product, HLVD contamination effectively destroys its commercial value.